After a successful party at Bodie Island's Lighthouse Library, librarian Lucy Richardson is ready to curl up with her cat, Charles, and a good book. But her R and R is cut short when she notices some mysterious lights leading a small boat to crash into the coast.

The two shipwrecked seafarers survive the ordeal—but one of them shows up dead ashore a few days later. Lucy finds herself again roped into a murder investigation and navigating a sea of suspects, all of whom had motives to deep-six the deceased. And this time, she has a sinking feeling that finding the real killer won't be so easy . . .