A road rage incident between two strangers — a failing contractor and an unfulfilled entrepreneur — sparks a feud that brings out their darkest impulses.

David Jung, a mysterious former US intelligence operative living in hiding in South Korea, has his life blown to pieces when the consequences of an impossible decision from his past come back to haunt him, and he finds himself hunted by Rebecca, a deadly young assassin, and Caddis, the sinister spy organization she works for.

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.

Da Eun works part-time and Kim Byul is an idol in her 5th years since debut. These two girls who look alike decide to change each other’s lives just for 7 days. It tells the romantic encounters of these 2 girls.