On this day, a shocking treasure theft occurred in the city, and the mastermind behind it was a group of nonsensical thieves. In order not to be discovered, they hid the stolen gems in a teddy bear. However, the "expensive" bear was sent to the toy factory by mistake, mixed in with thousands of identical teddy bears. The thieves were very upset. It would be like looking for a needle in a haystack to find it. At this time, the toy factory owner (played by Kwan Lee-kit) exchanged souls with his son. The son (played by Cheung Yi-kit) suddenly became the boss, and the father went to school with a schoolbag on his back. At a coincidence, the father and son met the jewel thieves, and the "son" was hijacked and held hostage by the thieves. This made the seemingly cowardly "dad" very anxious, but how could the "dad", who was only ten years old, rescue the "son" in danger...