Thomas Austin was once a prominent NYPD detective, known for locking up a psychopathic serial killer dubbed "The Holiday Baby Butcher". Now retired in a small beach town in the Pacific Northwest, Austin runs a little café, trying to overcome the loss of his wife, a DA who was gunned down only one year ago.

It's summer in St. Louis and Mercy Watts is on vacation from her parents. The great detective and his nosy wife are on a cruise and Mercy thinks she's off the hook for doing any investigating for them. But when a family friend has a fatal heart attack, Dad has one of his famous feelings and orders Mercy to look into it. Mercy tries not to get sucked in. She really does, but she's her father's daughter. Soon Gavin's death leads to a more grisly one, the death of a bride on her wedding day. Can the two be connected?

In the seaside town of Lighthouse Cove, everyone knows the best man for the job is actually a woman - contractor Shannon Hammer. But while Shannon can do wonders with a power drill and a little elbow grease, her love life needs work. On a blind date with real estate agent Jerry Saxton, she has to whip out a pair of pliers to keep Jerry from getting too hands on.Shannon is happy to put her rotten date behind her, but when Jerry's found dead in a run-down Victorian home that she's been hired to restore, the town's attractive new police chief suspects that her threats may have laid the foundation for murder.

Cherringham - a quiet town in the Cotswolds. Nothing ever happens there, or so it seems - until one morning a woman's body is found in the river. A terrible accident, according to the police. But is this true? Sarah believes there must be more to it. In Jack, a former NYPD homicide detective, she finds a partner who is willing to start investigating with her. They soon find out that things are not as clear as the police want them to be ... This first - of many cases brings Sarah and Jack together in an unlikely partnership.

Across the Pacific Northwest, a twisted killer stalks victims representing ancient archetypes: The Ruler. The Warrior. The Scholar. The Priest. Four are dead, leaving FBI investigators puzzled by the macabre, color-coded shrines the killer left behind. And clues now point to a fifth victim.