From the #1 New York Times bestselling author of the We Were Liars series comes a love story full of simmering darkness and astonishing twists, following two teenagers whose lives are shattered by a shocking transformation.

Once, in a small New England town known for its hot springs, something terrible happened. Something that should have been a warning to stay away from the pools, if the stories were to be believed.

But no one is afraid of the water anymore, even if they should be.

When new girl Lexie meets golden boy Chester, their chemistry is undeniable. She’s running from a glittering life she won’t speak about. He’s hiding secrets of his own. Their connection feels bigger than both of them, despite their damage.

One frigid winter morning in that small New England town, five people go for a swim in the pools. Five people, including Chester. What happens there sends shock waves through the town, changing life as Lexie knows it forever.