Hannah Sampson has traded the chill of the Colorado Rockies for the sunnier climes of the British Virgin Islands. After she reports for duty to the sleepy Tortola Police Department, the sea gives up the corpse of a murdered tourist whose wife reported him missing after a night of partying—and possible infidelity.

The victim seems to have a squeaky-clean past, but Hannah suspects that his marriage wasn’t all smooth sailing. With few clues, conflicting testimony, and colleagues who are eager to sink her career, Hannah must navigate the stormy waters of betrayal, greed—and murder as cold as the deep blue sea.