After the humans fall asleep or leave the house, the lights dim and the rooms fall quiet, a hidden world awakens inside a single home. Tom is a cheerful, curious, and slightly cheeky teddy bear who loves Tomica miniature cars more than anything. His dream is to ride every single Tomica model. When no one is watching, he climbs into the driver's seat of a tiny vehicle from the Tomica Garage and sets off on adventures through the familiar rooms, now transformed into vast landscapes of possibility. The garage holds a fleet of real-world Tomica vehicles including police cars, fire engines, ambulances, and construction trucks, each selected for the problem at hand.

Tom is joined by a close circle of stuffed-animal friends. Chu is a timid and easily flustered mouse who tends to cause trouble in his hurry. Marie is a trendy, fashion-loving rabbit who serves as the group's gentle idol and adores flowers. Jam is a moon bear who considers Tom his rival, always trying to one-up him with his stubborn and competitive nature. Kitsu is a cool-headed Tibetan sand fox who maintains the Tomica Garage and knows everything about the cars, acting as Tom's reliable adviser.

Each episode presents a small domestic crisis. A flock of chicks needs to be transported to kindergarten. A sunflower loved by Marie is wilting under endless rain. A monkey cannot perform in the toy concert. A room becomes a chaotic mess during a drawing session. A giant Christmas tree causes trouble. It is Marie's birthday and everyone wants to give her the perfect present. A debate about whether dinosaurs exist sparks a playful investigation. A grand dance party needs to be organized. In every case, Tom and his friends turn to the Tomica Garage, select the right vehicle, and work together to solve the problem with imagination and teamwork. The stories are short, self-contained, and built around the simple but enchanting idea that toys have a secret life of their own, full of warmth, minor mishaps, and small triumphs.