Fan Casting Grey Clouds and Heavy Rain

In a world where heroes cease to exist, a successful, ruthless, and dejected bounty hunter (Marcus) is tasked with killing a renowned serial killer known as 'The Flashback Killer' (Nathan) and his mysterious female love interest and partner (Alison). While doing so, he also finds himself attracted to another serial killer (Rebecca) who resembles a solid motive to his own, and a young pair of serial killers (Johnny & Estelle) who battle with young upcoming parenthood, and their dirty serial killing ways. As Marcus pursues a cat-and-mouse chase with Nathan, the obnoxious killer tends to fixate on Estelle as his new target after a small altercation, and Marcus tends to lock horns in terms of morality and perspective, which imbues an everlasting feud between the two.