Water Tank Murder Mystery (1994)
Original title: 重案實錄之水箱藏屍
Water Tank Murder Mystery is a 1994 Chinese-language action movie directed by Dik On, with a running time of 1h 19m. It stars Danny Lee Sau-Yin, Cheung Kwok-Keung and Cindy Yip Sin-Yi.
A body is found inside a water tank a top of an apartment building. It's not a hard case to solve for Danny Lee and company.