Murderer (살인자) is a 2014 South Korean thriller film directed and written by Lee Ki-wook.
[2] It revolves around Joo-hyeop, a secret serial killer, who resolves to eliminate the only person who knows his true identity — his son's newfound friend.
In a quiet countryside, Joo-hyeop, concealing his dark past as a serial killer, watches anxiously as his son befriends a girl who unwittingly discovers his true identity.
Fearing exposure, Joo-hyeop makes a chilling decision: the girl must be silenced to protect his fragile new life with his son.
Murderer thus attracts attention by presenting a different perspective on serial killers", stated WowTv Korea.