Sumi accidentally broke a borrowed out-of-print mecha collectible figure. While seeking help everywhere, she unexpectedly discovered that the legendary repair master was actually her mechanic dad, who was hiding the secret of his layoff. To successfully return the figure, the father and daughter teamed up in a cramped storage room to launch a time-limited repair operation. However, at the very last moment, due to extreme fatigue, the dad's old hand injury relapsed, and his violent trembling made him unable to complete the precise micro-welding. Facing the upcoming delivery deadline, an inexperienced Sumi decided to pick up the soldering iron herself and face this thrilling repair challenge together with her father.