Mouse (Season 1)

Mouse (마우스, 2021) is a South Korean crime series you can watch online on iFILM. Directed by Kang Cheol-woo and Choi Joon-bae, it opens with a question that sounds like science fiction but isn't: what if you could test an unborn child for psychopathy with 99% accuracy? A serial killer the press calls the Headhunter has terrorized the country for years, and the legislature is actually debating a screening law.

A decade later, the ripples from those murders have quietly shaped four lives without any of them knowing it yet. Rookie officer Jung Ba-reum (Lee Seung-gi) still trusts the system. Veteran detective Go Mu-chi (Lee Hee-joon) lost that faith long ago. Their pursuit of a new killer will hollow both of them out in different directions.

The series runs 20 episodes and saves its sharpest moves for the middle stretch, where an unexpected reversal reframes everything before it. It works less like a whodunit and more like a pressure test — on the characters, and on anyone watching who thinks evil is easy to recognize. Stream all episodes of Mouse (2021) on iFILM.