There’s something in the lake at Wren Hall.

At the notorious Greyscott's Academy, reputation is everything. For Meg the rules are simple: keep your head down, know your place, and stay invisible until graduation. That is, until the glamorous and intimidating Wren twins - Lottie and Sebastien - decide to take Meg under their gilded wings. 

But not all that glitters is gold. 

Following an incident at the Midsummer Ball, Meg finds herself suspended from school and shunned by Lottie, Sebastien and all their friends. Desperate to make amends, she accepts an unexpected invitation to an exclusive party at Wren Hall. 

But when one of the party-goers disappears and a violent storm traps the group inside the house, she realizes there's more to the Wren twins than meets the eye.