Toodles hires detectives Tom and Jerry to investigate and protect her against a threat to her Tuna can inheritance. They go investigate, and a mysterious and menacing figure keeps trying to hurt them.
An unlucky dog named Dutch goes to Detectives Tom and Jerry, saying that a ruby stone he has been guarding from his great grandfather’s master pirate “Captain Wrongway Weston” is taken from a female dog named Roxy, who is also unlucky.
Upon seeing Tom unable to catch Jerry, Butch recruits the former to join the League of Cats, a secret organization of cats who work together to catch mice.
When a burglar has been breaking in homes, Rick and Ginger leave Spike in charge and Spike teaches Tom and Jerry how to protect their home and defend themselves.
Both Tom and Butch compete against to go after Ginger’s mom’s bird when her and Rick watch it for the weekend. Jerry also makes sure nothing happens to the bird.
A sequel to Pecos Pest (1955), Jerry’s uncle, Pecos Pest, returns to Tom and Jerry’s house for a visit, where he constantly sings and plays on his guitar, annoying and keeping both Tom and Jerry awake.
