He is My Enemy, Partner and Father-in-law

Stallone is a rotten gangster whose mother is a heavy gambler. An experienced cop nicknamed Y2K is a conservative and stubborn man. Coincidentally, the trio gets acquainted in an underground deal. The police want to make use of Stallone to bait a serial killer, so they intentionally announce to the media that Stallone is the only witness which leaves him no choice but to move in with Y2K.