At an exclusive wine tasting, host Raymond Bettane dies from a spiked drink. As the detectives question each of the guests, Mick makes a shocking discovery about Bettane's vintage wines.

When an art historian is found murdered in his home, DI Mick Palmer and DC Shazia Malik are sent to investigate. As they dig into the case, they uncover a vandalized painting, sabotaged security footage, and a dark family secret.

The detectives look into the discovery of a gold Viking hoard stolen from a prehistoric burial chamber. After the site is reopened, they unearth a series of secrets and betrayals leading to a thousand-year-old cover-up.

A music producer is battered to death in his studio and his rare rock memorabilia stolen. But when the victim's collection is later found dumped in the river, Mick and Shazia question the killer's motive.