Death at the Spring Tide

Tony owns a boat hire business on the Norfolk Broads. He is requested by his friend Sgt. Westgate to help search for a missing boat that was taking a woman down to Gt. Yarmouth. They find the boat, sunk, with a body onboard. Next night the mill where the woman was staying catches on fire, and Tony helps put it out. The circumstances surrounding the woman and her husband become suspicious and Tony with his knowledge of boats and maps is asked to help the police. A young woman comes to ask Tony for help in learning about boats as she wants to run day trips from her home town of Yarmouth. When a close friend of Tony is attacked the police enquiry becomes a personal matter. With the help of his new assistant they become involved in a bizarre series of events which ends with another death.