Fred, Daphne, Velma, Shaggy, and the talking dog, Scooby-Doo, travel on the Mystery Machine van, in search of weird mysteries to solve.
Dick Dastardly and his snickering canine co-pilot Muttley plot to stop Yankee Doodle Pigeon aboard their World War I flying machines.
While chasing Jerry around a dock, Tom sees and instantly falls in love with a female cat. The female cat appears to return Tom's interest, so Tom sneaks aboard the ship the female cat and her owner have just boarded. Jerry follows Tom onto the boat and proceeds to interfere with Tom's subsequent flirtations.
