far & away the best thing about this book is that it introduces my all-time favorite tertiary babysitters club character, cary retlin. i fully intend to name my first child cary if he is a boy, after cary retlin. seriously. i already have my boyfriend on board with this plan. cary is a new eighth grader in stacey's homeroom. he's pretty gregarious & a bit of a class clown type. stacey finds him somewhat inscrutable, & also "hunky". even though she is still dating robert, with whom she is in "luv". shortly after cary starts attending stoneybrook middle school, a wave of pranks starts happening. someone breaks into stacey's locker & switches all her books with sabrina bouvier's. someone swipes one of the english teacher's grade books. all the cars in the teachers' parking lot have their windows soaped. someone smears peanut butter on the door handles. every prank is accompanied by a card that says "mischief knights". no one knows exactly who or what the mischief knights are, but stacey suspects cary. it does not escape her that the pranks started soon after he became a student. none of the pranks are really all that evil or anything--just inconvenient & sometimes aggravating. most of the kids at school think the mischief knights are awesome.
halloween is around the corner, yet again, & the administrators at SMS decide to have a halloween masquerade dance. stacey joins the decorating committee. she's really excited to help out with the dance & dress up in costume with robert. the committee is being overseen by a new teacher named mr. rothman. stacey thinks mr. rothman seems like a cool guy. he mentions something about having attended a halloween masquerade many years before, & the principal said something about how SMS has not had a halloween masquerade in 28 years, & how he is hopeful that the dance will go smoothly so everyone can forget the painful memories of the past. i don't know what principal that is halfway competent at his job would say something so cryptic to a bunch of tweens, but whatever. the decorating committee overrules cokie mason's suggestions of pumpkins & cut-out witches & opts for an addams family reunion theme. i think the pumpkins & witches sound way cooler, but maybe i don't have my finger on the pulse of the youthquake anymore. stacey decides to dress up as morticia addams & have robert dress as gomez.
but then weird things start happening with the dance preparations. someone rips up the advertising posters claudia makes. one of the decorating committee kids brings in some streamers & colored light bulbs, which are duly destroyed by an unknown person. someone scribbles "will you still love me tomorrow?" in blood red spraypaint on one of claudia's posters, & writes "$10" in huge numbers on the wall of the gym. stacey doesn't know what the fucking is going on, but she has a few suspects:
1) the mischief knights. their pranks thus far have not been this creepy & destructive, but maybe they're upping the ante.
2) grace blume. she's been talking about how she's dating a cute boy from another school, & he is accompanying her to the dance. her best friend, cokie, doesn't believe the dude exists & is worried that grace is going to look & feel stupid when she doesn't really have a date. stacey wonders if grace is trying to sabotage the dance to cover up the fact that she doesn't have a date. yeah, that theory is exactly as crappy & belabored as it sounds.
3) a local crackpot community member who has been writing angry letters to the newspaper over how the school is wasting its budget on school dances instead of educational fundamentals. his letters keep alluding to some tragedy that befell a previous halloween masquerade 28 years before.
4) mr. rothman. who is he? where did he come from? would he have a reason to sabotage the dance?
the babysitters get to work solving the mystery. with the help on old newspapers on microfiche, they discover that the last SMS halloween masquerade took place 28 years ago. there was a power outage & people panicked & stampeded for the doors. in the melee, an elderly teacher fell & had a heart attack. he died. the school never held another halloween masquerade again.
the babysitters then ask richard & sharon if they remember anything about this incident. their memories ore hazy, but they do remember that an eighth grade girl was involved somehow, & left school shortly thereafter. sharon says something about, "that poor girl." the babysitters dig out some old yearbooks & make a list of female eighth grade students that are not pictured because they moved away from stoneybrook before class picture day. then logan leads them all into the basement of the school, to a dusty room full of old student records. they pull the files on each of the girls & narrow it down to elizabeth connor. stacey also sneaks mr. rothman's old student file into her bag.
the babysitters learn from elizabeth's file that she used to live in charlotte johanssen's old house. luckily, they have a babysitting job there soon. they scheme to bring some other charges over to play with charlotte & search the house for any clues elizabeth connor may have left behind...28 years ago...when she was 13...this is pretty fucking farfetched. but lo & behold, they find a patch of concrete in the basement that was apparently poured when elizabeth still lived there. it's a heart with the initials "L.C. + M.R." in it. liz connor...plus michael rothman?
at the next decorating committee meeting, stacey boldly corners mr. rothman & asks about liz. & instead of telling her to mind her own damn business, he takes her aside & pours his heart out. apparently he was one of the most popular kids in stoneybrook middle school when he was 13. he was a football player & lots of girls had crushes on him...including liz connor. liz was not popular, but michael was always nice to her anyway because he tried to be kind to everyone. he didn't realize how strongly liz felt about him, & that his kindness was only getting her hopes up that he might like her back. some of his friends dared him to ask her to the halloween masquerade. they offered him $10 if he spent the whole evening with her. he accepted because it was important to him to remain popular, & he didn't realize that his actions could potentially hurt liz's feelings really badly. he asked her, & she accepted. when he went to pick her up, she was wearing an awful embarrassing baby-ish fairy princess costume, but seemed to have no idea that she looked like an idiot. they went to the dance & everyone was snickering but liz was so excited to be there with mr. rothman that she didn't notice. they danced together all night & mr. rothman tried to keep her away from his friends that might make fun of her. at one point, she left to use the bathroom & came back to catch him talking with his friends. she could tell something was wrong. he tried to shrug it off, but when the band launched into the last song, "will you still love me tomorrow?", he couldn't fake it anymore & he abandoned her on the dance floor. he doesn't explain exactly why he couldn't hang in there for just three more minutes, but...whatever. as he left, he threw a $10 bill on the ground to show his friends he didn't care about the bet anymore, & liz saw it. somehow she figured out from this that he'd only asked her on a dare & she got angry. she stormed out of the gym & shortly thereafter, the lies went out. kids stampeded, a teacher feel & died. liz transferred schools soon after.
mr. rothman thinks liz is back in town & is behind the vandalism of the posters & whatnot. stacey is convinced. they agree that the trauma of being asked to a dance on a dare traumatized her for life, to the point that she is willing to violently sabotage a middle school dance 28 years later.
...sure. that seems plausible.
they seem to get their confirmation the next day when they walk into the gym to check on the decorations & find an effigy wearing a babyish fairy princess costume hanging from a basketball hoop. at that point, if i were mr. rothman, i'd start suspecting stacey, & if i were stacey, i'd start suspecting mr. rothman, but both of them remain convinced that it's liz.
the dance happens. people dress up. mr. rothman spends all evening dancing with a female teacher dressed up like a witch in a cloak. grace shows up with her foxy boyfriend from another school. people have fun. toward the end of the night, stacey ducks into the bathroom & finds a lady teacher shivering in just leggings & a camisole. it's the witch mr. rothman had been dancing with. someone spilled onion dip on her cloak & then stole it. stacey just knows it's liz. she runs back to the dance & finds mr. rothman dancing with a woman in the cloak. she runs over to warn him, but then the lights go out for the masquerade reveal. everyone is supposed to remove their masks when the lights come back on. when the lights come back on, mr. rothman realizes he is dancing with liz. stacey takes one look & can tell that liz is completely batshit crazy.
& then, rather than telling the reader what happened next, we cut to a babysitters club meeting where the sitters are all like, "then some guys with butterfly nuts came & carted liz back off to the nuthouse." the end. seriously. that's the end of the book.