Fantasia (Chinese: 鬼馬狂想曲) is a 2004 Hong Kong comedy film produced, written and directed by Wai Ka-fai and starring Cecilia Cheung, Sean Lau, Louis Koo, Jordan Chan, Francis Ng and Christy Chung.

[1][2] In 1969 Hong Kong, private detective agency director Man (Sean Lau) and his two employees, Sam (Louis Koo) and Fugu (Jordan Chan), are investigating an adultery case, where they track their target and crashing into an antique shop, where they end up causing a lot of damage there.

At the same time, Fugu also receives a call from his aunt informing him that her cousin, Jane Lam (Christy Chung), who is a student of Stanford University studying Aerospace Technology, have gone mad due to over-studying, and is now missing.

One time in a mahjong game, Bobo's failed spells causes Man to be exposed from his cheating, and thus, he forges a rivalry with gang boss Kin (Francis Ng).

Bobo's cousins, the Chopstick Sisters (Charlene Choi, Gillian Chung), also happen to be at the hands of Kin, who took them as his goddaughters.