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.

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.

An American millionaire who planned to donate his collection of Titanic memorabilia is found dead in his hotel room in Belfast. Discovering that the man was poisoned, Mick and Shazia suspect someone wanted to stop the donation.

Mick's father, Ron, is taken hostage by a criminal gang for stealing a valuable painting from them-and Mick gets an ultimatum; he and Shazia must investigate the theft of a rare Chinese vase that has disappeared from a locked vault.