While out on an errand, Sakamoto and Shin encounter Lu Shaotang, the daughter of a mafia boss, who's on the run and targeted by twin assassins.

To rescue Lu, Sakamoto and Shin infiltrate a top-secret lab seized by assassins. Meanwhile, in the prison cell, Lu meets someone from Shin's childhood.

The crew faces Wutang in a high-stakes casino showdown to learn who issued Sakamoto's bounty. Meanwhile, X sends a group of vicious assassins their way