Tom and Jerry are forced to go back to Detective School in order to renew their detective licenses.

Tom, forced into driving a race car created by evil Dr. Otto, terrorizes the village mice until Jerry Van Mouseling comes to their rescue.

Tom and Jerry are hired by Dixie Wolf to find all the sheep that have gone missing.

When Tom drinks a potion given to him by a Gypsy woman and shrinks to the size of an insect, he must beg Jerry Van Mouseling for help in finding a cure.