An abandoned kitten accidentally stumbles into a mysterious villa. The owner of the villa, Lawrence, a retired magician, adopts the kitten and names it "Thunder." Soon, Thunder becomes fast friends with all sorts of fascinating robots living in the villa. However, a large white rabbit and a small white mouse in the house have always disliked outsiders coming to the villa. The white rabbit and the white mouse try every possible way to drive Thunder out. Lawrence often goes to the hospital to perform magic for children. On his way back from one such trip, the white rabbit attempts to expel Thunder but ends up causing Lawrence to have a car accident, and Thunder also faints on the road. While Lawrence is hospitalized, his nephew attempts to secretly sell the villa. Thunder comes up with a brilliant idea: turn the villa into a haunted house. Together with its little friends, they will join forces to protect their home...