Rory Wilson and Celeste Markham are friends. Or that's what everyone thinks. Their boyfriends are co-captains of the soccer team, they hang out with the same group, and they're even going to the same college in the fall. The truth is, they've been secretly sabotaging one other since middle school. But because Rory knows one of Celeste's darkest secrets, and likewise Celeste has dirt on her, she's sure they'll keep up the BFF pretense as long as they can.
But when Rory spies her boyfriend hooking up with Celeste, the endgame begins. Now she has plans to ruin Celeste's perfect life once and for all. It'll happen at the beach house where their whole friend group is kicking off the summer with a week of chilling by the pool, partying—and, if Rory plays her cards right, shocking revelations that will turn everyone against Celeste.
But taking down a frenemy is no easy task, and Rory's not the only one in the house bent on destruction. Either Celeste is even more devious than Rory realized, or someone else is stealthily playing the circle of friends against one another. As a storm strands them all in the house, tensions rise and the dangers escalate. Rory doesn't know whether she's the target of this secret revenge, or if Celeste is. Will she be the one to end up dead? Or the one without an alibi?
