An 800-pound recluse, aka Dale the Whale, is the number one suspect in a murder case. But how can a man who can't even fit through his bedroom door be a murderer?

Monk, who suffers from vertigo, investigates the death of a police detective murdered on a ferris wheel.

Braving his fear of flying and of enclosed areas, Monk boards a plane with Sharona and solves the murder of a passenger's wife.