As the captain of Field County's ice rescue dive team, Callum Cook is driven to perfection. But when he meets new diver Louise "Lou" Sparks, all that hard-won order is obliterated in an instant. Lou is a hurricane. A walking disaster. And with her, he's never felt more alive... even if keeping her safe may just kill him. Lou's new to the Rockies, intent on escaping her controlling ex, and she's determined to make it on her own terms... no matter how tempting Callum may be. But when a routine training exercise unearths a body, Lou and Callum find themselves thrust into a deadly game of cat and mouse with a killer who'll stop at nothing to silence Lou-and prove that not even her new Search and Rescue family can keep her safe forever.