Kunimatsu Onda, owner of the ‘Matsuya’ pachinko chain, has handed the business over to his son Ryosuke and is now living a life of leisure. A notorious womaniser by nature, he would constantly make advances at women here and there, much to the annoyance of his wife, Masayo. Under the pretext of visiting a new machine manufacturer’s factory, Kunimatsu sets off for a hot spring resort to enjoy an affair with the geisha Momono; however, Masayo, having caught on to his plan, instructs Ryosuke to keep an eye on him and, accompanied by the shop manager Maruyama, heads to the hot spring herself. What was supposed to be a fun night turned into a family gathering, but during that time, the shop came perilously close to being taken over by a gang of professional pachinko players led by Eiko.