Wayne invents an invention called the 3iDer which turns people into different people. The invention and Wayne got nominated for the inventors recognition achievement award. An evil clown tries to steal the invention and frame Wayne so it is up to Team Szalinski to stop this clown and clear Wayne's name.

Wayne's comment at a seminar offends some witches. The witches cast spells on the family. Now they must stop the witches and get Nick back.

Wayne goes back in time to prove to his family that the Bopkas and the song he likes really do exist. There he finds out that they are Russian spies with plans to take over the world by overthrowing parents. The family goes back in time to help him stop them. One question remains if they never sang the song, then where did he hear it?