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.
After a car accident leaves one man dead and another in a coma, it's believed that the dead man was at fault. Guilt-ridden, his wife, Hee-ju, struggles to move forward. She ends up learning that the victim had previously tried to kill himself. Suspecting the accident may have been on purpose, she begins an investigation.