The perfect wedding in Hawaii for Sarah Donovan and Dan Weatherby is in jeopardy when they stumble upon the illegal drug trade that puts them and everyone around them in peril. Diane, Gabe, George, and other colorful characters from A Few Deadly Sins return to face new challenges—some of their own making, some they happen upon innocently with potentially fatal consequences. The sweeping landscape of the Hawaiian islands provides the backdrop for a drama unfolding above and below sea level. Sarah confronts external and emotional demons that test her faith in Dan as well as in herself. “God, it would be nice if I didn’t have to kill anyone just before my wedding,” she prays. But paradise is just a façade over an evil underworld that is determined to stop at nothing to build castles for themselves.