Dong-hoon Choi directs Alienoid, a time-bending film about aliens and a feudal swordsman chasing a legendary sword. For many years, aliens have been using the human mind as a prison for intergalactic offenders. Now, these criminals have managed a jailbreak. If they aren't stopped, they will kill massive numbers of people. In order to stop them, their guard must travel back in time. While there, he encounters Muruk, who is chasing his own destiny by seeking a legendary sword.