Detective Jeff Jackson is called on to oversee the safe passage of recently recovered emeralds worth $5,000,000 to the rightful inheritor: Zee Madeiras' good friend Britt Prajna. Britt is the owner of The Pendray, one Martha's Vineyard's finest hotels, and is hosting a lavish affair to showcase the emerald brooch before loaning it to a museum. Shortly after the event, the jewels go missing, tragedy strikes and the suspect list includes some of the Vineyard's most powerful people and members of Britt's own family. With the latest crime hitting too close to home, Jeff and Zee again team up to recover their friend's stolen heirloom before it's too late.

After being injured and facing loss in the line of duty, retired Boston Police Detective Jeff Jackson returns to a quiet life of fishing, living in his late father's home on Martha's Vineyard. When a mysterious visitor to the island turns up dead, Jeff is reluctantly recruited to help in the investigation by the local police chief, a family friend. Adding a layer of complication, Zee Madieras – the chief's daughter and Jeff's former flame – is the medical examiner on the case. As the murder investigation casts suspicion on some of the town's most powerful and wealthy citizens and brings Jeff and Zee's lives in peril, they race to solve the case before another murder strikes the peaceful vacation town.