The police research Ding's background and discover that he is a retired Central Security Bureau officer from Beijing, and they figure that he is suffering from dementia.

Ding, in turn, frequently cares for a little girl next door named Cherry, whose father, Li, is an abusive gambler.

Ding, who has been plagued with guilt for years, ever since his granddaughter went missing on a hiking trip, resolves to bring Cherry back using force.

He visits the gambling house demanding Cherry's release, and when Choi's gang attempts to kill him, he overpowers around 20 of them including a skilled knife assassin.

At that moment, some of the Russian gang members appear and start to kill the rest of Choi's men in an attempt to reclaim their stolen money.

At the same time, the police, led by Park's son, chase after two leaders of the Russian gang, who die when they collide with a truck.

In a scene after the credits, the two countryside criminals accidentally encounter a group of drilling PLA military police, who turn and give chase.

[5] On 22 September, guest star Andy Lau filmed an action scene in Vladivostok, Russia in which he portrays a thief who stole a bag of diamonds and flees by jumping from a building to the top of a car.