Oh Yun-su

In the darkness of night, a man and a woman walk in an alley sharing a cigarette. They are detectives working together. Their story is complicated: They are about to make up a scene where they arrest a criminal whom they have already caught. In fact, this time with the help of TV crews, with whom they had a secret agreement, they are about to restage the event and act as if they are arresting the criminal for the first time.

So-hee enjoys her seemingly perfect life as a newlywed with her seemingly perfect husband. For being so perfect, she begins to suspect that her husband isn’t as he seems. Wanting some answers, she hires a private detective agency to trail him around.

Hyun-su and Soo-jin are newlyweds. Seemingly out of nowhere, he starts talking in his sleep. "Someone's inside." From that night on, whenever he falls asleep, he transforms into someone else with no recollection of what happened the night before. Soo-jin is overwhelmed with anxiety that he'd hurt her family while she sleeps and can barely sleep a wink because of this irrational fear. Despite sleep treatment, Hyun-su's sleepwalking only intensifies, and she begins to feel that her unborn child may be in danger.

Dong-hyun is a high school student. One day, he falls from the rooftop and bumps into Pan-soo who is a passerby. Pan-soo is a member of a criminal organization. When the two men wake up in the hospital, they discover that they have switched bodies.

When the crew of a space junk collector ship called The Victory discovers a humanoid robot named Dorothy that's known to be a weapon of mass destruction, they get involved in a risky business deal which puts their lives at stake.

While investigating a terroristic threat that goes viral online, Korean authorities discover that a suspect has recently boarded an international flight bound for the United States. When a healthy passenger on the same flight suddenly dies a gruesome death of unknown cause, panic erupts both in-flight and on the ground. With steadily decreasing fuel and international refusals to offer aid, the captain and crew will be forced to take unprecedented emergency measures in an attempt to save the lives of their passengers.