First Strike, also known as Jackie Chan's First Strike or Police Story 4: First Strike, is a 1996 Hong Kong action comedy film directed and co-written by Stanley Tong, and starring Jackie Chan, Jackson Lou, Annie Wu, Bill Tung, Yuri Petrov, and Nonna Grishayeva. It is the fourth film in the Police Story series. Chan plays Jackie, a Hong Kong police officer who works for the CIA to track down and arrest an illegal weapons dealer. Jackie realizes that things are not as simple as they appear and soon finds himself a pawn of an organization posing as Russian intelligence.
Whilst working for the CIA, Jackie (Jackie Chan) is assigned to follow leads of a nuclear smuggling case. One of the tasks the CIA gives him is simple enough: watch a woman named Natasha while on a plane from Hong Kong to Ukraine and record her movements. Jackie arrives in Ukraine and the CIA, partnered with local Ukraine security, take over the task of following Natasha. However, the CIA operation almost falls apart when the Ukrainian Strike Force arrest Natasha. Luckily for the CIA, Jackie spots Natasha being driven away and he discreetly follows her. During the chase, Jackie discovers that Natasha is working with unknown male partner, who actually called in the Strike Force to prevent Natasha from being followed. Natasha and the unknown male are also romantically involved. Jackie decides to follow the unknown male to a remote lodge in the Ukrainian mountains, and informs the CIA of his location. The unknown male is apparently meeting with Russian mafia members who are interested in a nuclear bomb that's in his possession. The criminals are on high alert when they spot Jackie and agents of Ukrainian security and the CIA arriving. A gunfight ensues. During the battle, the unknown male is identified as Jackson Tsui (Jackson Lou), a Chinese-American nuclear scientist with CIA links, suspected of stealing a nuclear warhead. Jackie finds a briefcase which contained evidence from Tsui, but as he is chased by mafia forces, Jackie loses the briefcase as he falls into frozen waters, and the mafia takes the briefcase.