Max spends a weekend away from Harmony, looking after a hotel, where the only couple staying are a mystery. Lomax is left to play host to a married couple when he calls on an old friend and, later, becomes involved in a mystery when the wife is abducted.

Lomax and Steve, Max's son, spend a week together on the canals; Steve challenges Max to prove his innocence. He knows his father needs money to finance his quest and robs a betting shop. However, the shop belongs to local gang boss, Jack Ormand, who sets his heavies on the trail.