After encountering a strange creature, Max & Molly go back in time to the San Diego Zoo in 1923. There they discover a zookeeper had once tried to make all the animals seem more frightening to lure in curious customers. This includes the guinea pig with fake fangs in its mouth that they discovered! While there, they help the zoo owner with a problem. But when the devious Mr. Conklin shows up, the Problem Solvers become separated by space and time!