[close] Ernie Banks, named for the legendary Chicago Cubs shortstop, is a troubled, thirteen-year-old juvenile delinquent. Abandoned on the doorstep of the Lakeside Home for Boys when he was three years old, his only proof that he once belonged to somebody is a vintage Ernie Banks baseball card, a crystal acorn he wears on a string around his neck, and a strange spiral birthmark on the bottom of his right foot.

As a last reprieve before being sent to a juvenile detention facility, Ernie is allowed to spend three weeks on a working farm. When Ernie arrives at the home of Russ Frazier, he learns that the widower s baby was kidnapped years before. Ernie is determined to solve the case. He teams up with Joey, a local tomboy, to investigate clues that lead them on a dangerous journey into a forbidden world of dark secrets, magic puddles, and the cavernous underground kingdom of the Puddlejumpers eleven-inch-tall water creatures with whom Ernie has a mysterious connection. [close]