In the fog-drenched marshes of Tidehaven, a burnt-out scientist and a guarded ex-Navy SEAL must navigate deadly secrets and slow-burn desire, where falling in love might be the riskiest choice of all.

Emery Caldwell needs a change. After seven years teaching marine biology, having grant after grant denied, and growing tired of her mediocre relationship, she's burnt out. When a sabbatical offers the chance to reset, Emery heads south to the quiet fishing village of Tidehaven, South Carolina, hoping to gather research for a new journal article—and maybe find the direction her life desperately needs.

Reid Morgan has fought hard for peace. After leaving the Navy SEALs behind, he's built a quiet life working at the Driftwood Marina, where the days are predictable, and the past feels farther away. The last thing he wants is trouble, or the curious, determined scientist who stirs up things better left buried.

But when Emery witnesses something she shouldn't in the fog-thick marshes, suddenly both of their lives are in danger. As a deadly threat stalks Emery, Reid steps in to protect her—but getting close means letting her break down all the barriers he's worked so hard to build. As danger grows, so does their unexpected connection. But facing the truth—and each other—may be the biggest risk of all.