"One stormy night a little black kitten appears on the museum steps. Tabby cat Tasha is delighted to show Peter the museum's passageways and secret corners but the other cats aren't as keen to welcome the new arrival. Determined to prove that Peter is just as much of a museum cat as any of the others, Tasha takes him on a rat hunt. But the pair's quest almost ends in disaster when they find themselves in the Dinosaur Gallery, with its famous T-Rex...