A rather ordinary magician, called Morton the Affordable, is entertaining Billy's birthday party - not very successfully - until Old Tom's antics disrupt the party, and Morton's assistant quits. Morton desperately needs a new assistant for his appearance on an important TV show, and he picks Old Tom. This makes Billy jealous and, just before the show, he locks Old Tom in one of the magician's boxes and takes his place as Morton's assistant. The performance starts badly, until Old Tom escapes from the box and turns the magic act into comic mayhem. The audience is so amused that Morton becomes a big success and discovers the art of showmanship from Old Tom.

Angela won't let Old Tom keep his new pet - a goat. However, instead of taking it back to where he got it from, Old Tom hides the goat in his room. Meanwhile, to make up for the pet, Angela buys Old Tom an insect-eating plant. To his dismay, the plant won't eat insects but, when his back is turned, it eats the food off his plate and grows bigger. When the plant tries to eat Angela, Old Tom rescues her in the nick of time and they flee the house. Meanwhile, Lavinia arrives, not knowing about the carnivorous plant. Angela and Old Tom return just as the plant is devouring Lavinia, and they manage to rescue her. At that moment, Old Tom's goat escapes from its hiding place and eats the plant.