[3] Kai Jin, a young Chinatown chef in present-day San Francisco, becomes entangled with the Chinese Triad's pursuit of deadly ancient powers known as the "Wu Xing".

After an encounter with a mystical spirit, Kai reluctantly becomes the Wu Assassin, imbued with the skill and power of 1,000 monks who chose to die together to place their collective essence into an amulet.

Having absorbed the amulet, Kai uses his enhanced martial arts skills to recover supernatural powers from five modern day criminals threatening to destroy the world.

[6] In July 2018, it was announced that Tzi Ma, Tommy Flanagan, Lewis Tan and Katheryn Winnick were cast in their respective main roles of Mr. Young, Alec McCullough, Lu Xin Lee and Christine Gavin.

[14] After the film announcement, it was confirmed that Iko Uwais, Lewis Tan, Lawrence Kao and Juju Chan would reprise their respective roles (Kai, Lu Xin, Tommy and Zan) in Wu Assassins: Fistful of Vengeance.

The critical consensus reads "Though its story at times leaves something to be desired, Wu Assassins's exceptional choreography and bold aesthetic makes it an action packed delight.

Allen wrote: "[Wu Assassins] harnesses Uwais' energy as both a fighter and an actor in an exciting fashion, and creates a giddy opportunity for martial arts awesomeness to flourish.

But it does effectively showcase lead Iko Uwais" and praises the fight sequences, "brawls so carefully choreographed they play like bone-crunching ballets — "Wu" coasts on the same, all-important rule of cool every Hollywood action franchise [...] seems to have forgotten.