Burnt-out transit cop Jay forms an unlikely alliance with pickpocket Kay to stop a terrorist hijacker from blowing up a subway car during rush hour.

14-year-old Eun-hee moves through life like a hummingbird searching for a taste of sweetness wherever she may find it. Ignored by her parents and abused by her brother, she finds her escape by roaming the neighborhood with her best friend, going on adventures, and exploring young love.

High school student Sohee starts job training at a call center, but she faces pressure of greedy company. Detective Oh Yu-jin, who has something in common with Sohee starts to follow traces to reveal the truth.

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.