A shock collision forces Jack and Joan to travel together as her search for answers brings them to a beachside paradise. But all is not as it seems when they realize an accidental drowning was, in fact, murder.

When Jack takes a detour to help an old mate recover some stolen guns, he and Joan learn there's more to the robbery than it first appeared... and Joan begins to suspect that there is more to Jack than he's letting on.

Overwhelmed by new details about her late husband's past, and spooked by their growing connection, Joan is desperate to get some space from Jack, but finds herself alone and in danger when thieves target her motorhome.

Preparations for Joan's first Australian Christmas are put on hold after a SCUBA dive goes horribly wrong, and Joan and Jack discover the near drowning was really a case of sabotage.

Sparks fly when Jack and Joan are forced to share a hotel room in a small town pub on New Year's Eve. When a blaze breaks out after midnight, Jack and Joan are determined to discover who is really behind the blaze.

Jack must face his past mistakes when he's asked to help a young woman, a professional athlete, navigate a sports doping scandal.

Jack and Joan's search for a missing boy is complicated by the shock arrival of Joan's daughter Rebecca.

The return of a familiar figure from her travels enables Joan to piece together the truth about her husband, while an ominous threat from Jack's policing days emerges.