Home from college on his summer break, the narrator spends his time drinking beer and smoking with his friend nicknamed the Rat, listening to the radio, thinking about writing and pursuing a relationship with a girl with nine fingers. Three years later he has moved to Tokyo to work as a translator and live with indistinguishable twin girls. But the Rat has remained behind. Haunted by memories of the past, the narrator embarks upon a quest to find the exact model of pinball machine he and the Rat had enjoyed playing years earlier: the three-flipper Spaceship.