Ever since a hurricane devastated the small town of Mercy, Louisiana, a red algae bloom has taken over. Mutated wildlife lurks in the water that rises by the day, but Mercy has always been a place where monsters walk in plain sight. Especially at its heart: the Cove, where Noon's life was upended long before the storm at a party her older boyfriend insisted on.

Now, Noon is stuck navigating the submerged town with her mom, who believes their family have been reincarnated as sea cre...