Cross

Cross is a 2012 Hong Kong horror thriller film written and directed by Daniel Chan, Steve Woo, Lau Kin-ping, Hui Shu-ing and starring Simon Yam, Kenny Wong, Liu Kai-chi and Nick Cheung. The film revolves around a Catholic serial killer played by Yam, who after witnessing his wife's death, believes he is given the duty to kill suicidal people to bring them peace and thereby allow them to enter heaven.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.