Feedback Request

 

The author of the book whose query appeared in Face-Lift 1439 would like feedback on the following revision of the plot summary.

Eighteen-year-old Harlow is the last corrupted human alive. She's managed to contain the curse within her, but a single touch will spread dark magic and turn anyone into ash. [That "but" doesn't feel right. It should be followed (as it is in the original) by "her strength is slipping." This might work a bit better:
Eighteen-year-old Harlow is the last corrupted human alive. Thanks to the curse within her, a single touch will spread dark magic and turn anyone to ash. So far, she's managed to contain the curse. But her strength is slipping.]
When her older brother, Len, is accused of stealing an ancient relic, he mysteriously disappears. Branded as his accomplice, Harlow tries to run, but her secret is revealed when she turns the queen's soldiers into dust. Desperate to flee [escape] execution, she escapes [flees] with the help of an assassin who takes her into a secret society. [I don't think you take someone into a society. He leads her to the  lair/hideaway/headquarters of his secret society.] His leader explains the [her] curse is a gift. It has the ability to find corrupted objects like the one Len stole. He'll let her go if she recovers it, and might even tell her how to remove the curse.
Caught between the queen's executioner and other fierce enemies, she has no choice but to trust the assassin. As their uneasy alliance forges an undeniable spark, Harlow discovers the relic's true purpose: a power that devours all light. [Not sure what that means. All light everywhere? Permanently? Why would anyone want to do that? Does Len know what it does?] [In any case, I would say its power is to devour all light, rather than its purpose is the power...] Now, she faces an impossible choice to save the kingdom, save Len, or save herself. That's if the curse doesn't consume her first. [It's gonna be hard to save anybody if Len accidentally causes the relic to consume all light.]

Notes
Does Harlow have to physically touch a person to turn them to ash? If so, how many soldiers does she have to kill before the rest of them smarten up and start shooting arrows or other projectiles at her?
How does she discover the relic's power? 
This is an improvement, but I'm still finding myself asking a few questions you may or may not have room to answer. If you can't answer them here, try to prevent them from coming up.