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.
Sang-hyun is always struggling from debt, and Dong-soo works at a baby box facility. On a rainy night, they steal the baby Woo-sung, who was left in the baby box, to sell him at a good price. Meanwhile, detectives were watching, and they quietly track them down to capture the crucial evidence.
Seon-hee is a high school girl who used to tell lies to get her friends attention. She leaves Seoul guilt-ridden when her friend Jung-mi kills herself because of Seon-hee's lies. In the countryside where no one knows her, Seon-hee begins a new life as Seul-ki.
An aspiring hair designer named Hye Ni and an unemployed candidate named Chang Gyoon have a chance meeting at the newly opened "Momo Salon!"
Seol is an ordinary college student who was adopted but is living a happy life on her own. Working part time, she happens to have an unpleasant first encounter with Hae Young, a diplomat and the only heir of the biggest conglomerate in Korea. One day, he hears shocking news from his grandfather. The Blue House announces that they will carry out a vote on rebuilding the royal house, and his grandfather asks him to find someone urgently, who later turns out to be Seol. Against his grandfather’s wishes to donate their family’s wealth to the country, Hae Young tries to stop Seol, but she ends up moving into the palace to become a princess of the royal house.