Something draws history teacher Rick Grady across the school hall to German teacher Marty Lindson. Maybe it’s their shared love of the ocean. Maybe it’s just that Marty is so hot, but maybe it’s something more—something mysterious. All Rick knows is that every time he gets close, Marty pulls away. After another cancelled date, Rick goes to Marty’s apartment to demand an explanation. And what Rick discovers blows his mind.

The ocean calls to Marty because he’s a merman. He’s been afraid to get close to Rick, not just to keep his world a secret, but because Rick is his mate. And to claim his mate would change everything about Marty. No matter how much he loves Rick, he doesn’t know if he’s ready to alter his entire life.