The milky-white, sharp-tongued smart robot Tie Dan, along with four tenants of distinct personalities—landlord Jiang Chen, idiom black hole Jie Ke, germaphobe Shan Ben, and contrast-charming muscleman Yi Wan—stage hilarious daily antics of chaos in a shared apartment. As the original manufacturer tracks them down for a recall, Tie Dan's secret identity gradually unravels, and self-destruction crises alongside ethical questions between AI and humans follow one after another. Fighting side by side, everyone ultimately wins the lawsuit, and Tie Dan officially becomes the apartment's fifth resident, returning to the warm and bustling everyday life of human warmth.