Jack Johnson has a talent for trouble; wherever he goes on his narrowboat, it seems to follow him. Moored up on the River Avon in the beautiful Georgian surroundings of Bath, he's working at the local paper when a prominent magistrate and heritage campaigner is attacked and drowned. Could it be a serial killer copying the Canal Pusher? Or a biker gang who swore revenge on the magistrate? Against his wishes, Jack is pulled into the investigation by his ambitious editor who wants the scoop.