When Toodles hires Tom and Jerry to investigate and protect her against a threat to her Tuna can inheritance. They go investigate, and a mysterious figure keeps trying to hurt them. They discover Butch was also hired by Toodles to protect the tuna. Spike was guarding the cans, but was distracted by the fighting and leaves the cans unprotected. They discover Toodles wasn't being completely honest with her story.

Tom eats some canned cheese that has gone bad and hallucinates. Tom must become a better cat to end the nightmare.