High-flying US cop Bill Hixon's arrival in East Lincolnshire coincides with the reopening of a disturbing cold case.

When a mysterious stranger wanders into Boston suffering from amnesia, it provides Bill with the final clue to cracking a notorious unsolved case.

Bill battles a rising tide of fear when it seems a killer is targeting Boston's pensioners, but he soon discovers there's much more to the case than he first anticipated.

Bill gets pulled into a bitter feud between two farmers when a body is found between their properties.

Suspicion falls on members of the immigrant workforce after a suitcase containing the body of a farm owner is pulled from the river, but Bill discovers that the murder has more to do with the local criminal fraternity.

A chain of gruesome nail gun murders puts Bill on the hunt for an old hit man turned Crown witness, now in hiding.