Lionel Lo King-Wah

Inspector Waipong Wong has to put his life and resignation from the HKPD on hold to investigate his former partner's mysterious murder. What he and his crack team of three other cops uncover is a plot far more sinister than they originally anticipated.

In 1937 Shanghai, a soldier and a young woman have an awkward meet-cute in darkness under a bridge as they seek refuge during a bomb raid. Ten years later, the soldier, now a burgeoning songwriter and tuba-player in a marching band, is back in town desperately searching for his would-be soulmate. As fate would have it they end up living in the same building unbeknownst to each other. Through a series of mishaps, he mistakes her new ingénue roommate for his love interest and wacky love triangle hijinks ensue.

The final entry in Michael and Johnny Mak's Long Arm of the Law series, Underground Express once again tells a story of gangsters versus police, focusing on the difference between how both factions act depending if they're coming from Hong Kong or Mainland China.