LA BOUM is the story of a 13-year-old French girl dealing with moving to a new city and school in Paris, while at the same time her parents are getting a divorce.

Ib and Boum decide to commit suicide together in Bangkok in 1997. After reneging on the promise, the vengeful ghost of Ib returns 20 years later to haunt Boum and her 15 year old daughter, Bell.