While never-ending rain and a strange disease spread by cockroaches ravage Taiwan, a plumber makes a hole between two apartments and the inhabitants of each form a unique connection, enacted in musical numbers.

A strange disease starts to affect people in Taiwan just before the year 2000. The authorities order everyone to evacuate, but some tenants of an apartment building stay put, including a shop owner who lives by himself. One day, a plumber goes to the shop owner's apartment to check the pipes. The plumber drills a small hole in the floor, which comes down through the ceiling of another apartment. The hole never gets repaired, and this leads to some tension between the shop owner and the woman who lives below him.—Patrick Lin