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.

Dajun still lives with his father, who dates and plans to marry a ditsy starlet. The boy's mother is a flight stewardess, hence often away, and so Dajun's chubby cousin Yifen is often hired in as a child-minder. The relationship between Dajun and Yifen is, to say the least, abrasive, and Yifen bitterly resents being imposed on--especially when it seems that her own family is keen to get rid of her.