Donnie Yen's final battle with a US Marine Corps officer / Ip Man 4.

Ip Man, who came to Chinatown in the United States due to certain circumstances, unexpectedly gets involved in a dispute between local military forces and Chinese martial arts schools. Faced with escalating racial discrimination and oppression, Ip Man takes a stand and bravely fights in a battle at a United States Marine Corps base, showcasing the authenticity of Wing Chun and proving Chinese martial arts to the world.