Amanda Beckwith is a classic underachiever who finally hits the jackpot when she marries Santa Barbara wellness guru Geoff Martin. She is fast becoming the envy of her hip, 30-something girlfriends when Geoff dumps her for Bree, his massage therapist. With nothing to show for her short marriage but a couple of minor brushes with the law and a tiny drinking problem, Amanda escapes to Hollywood Beach, 20 miles south of Santa Barbara, to focus on her career as professional organizer and "Messy Girl" blogger for a small local newspaper.

When Bree is found murdered on the beach behind Amanda's house, her life spirals into chaos. Detectives single her out as a person of interest. With few people listening to her side of the story, Amanda resorts to her own devices to clear her name.

As Amanda edges closer to the truth, her status shifts from person of interest to next victim.