A scientist uses his invention - the "Menger Sponge" - to capture the energy of a dead child's spirit in an old building. In trying to determine why the energy of the ghost does not dissipate, the team discovers the identity and the dramatic story of the boy.
A boy lives with his Grandma and Mr. Lin, the tenant who looks after him and Grandma. But when Grandma passes away, the boy's uncle returns to Taiwan and discovers that ownership of the apartment was transferred to other people.
For a sleepless city like Taipei, the lives of the rich and poor occasionally cross. These people flit in and out of one another lives, in a seemingly endless food chain of love.
