Carter, who awakens two months into a deadly pandemic originating from the DMZ that has already devastated US and North Korea. He who has no recollections of his past finds a mysterious device in his head, and a lethal bomb in his mouth. A voice in his ears gives him orders to avoid getting killed and he's thrown into a mysterious operation while the CIA and North Korean coup chase him close.

Honed from childhood into a merciless killing machine by a criminal organization, assassin Sook-hee is recruited with the promise of freedom after ten years of service. However, secrets from her past destroy everything she’s worked for and now she embarks on a roaring rampage of revenge.

Se-hun and Jeong-i, who are in a long-distance relationship, meet and spend time together for the first time in a while.

Se-hun and Jeong-i, two people who express their hearts in vastly different ways. A journey through four seasons—winter, spring, summer, autumn, and back to winter again. How will the time we shared be remembered?

Mi-yeong loved dancing and singing as a child, and her dream was to become a musical actress. Because of her bigger physique, her dreams are often made fun of by her friends, and by her early 30s, she's living as an ordinary office worker who lost her dreams. One day, Mi-yeong's video of herself unintentionally becomes a symbol of misogyny. Her videos are increasingly getting viral on the Internet, and as to escape from all this, Mi-yeong sets off on a solo trip and meets Dae-hyeon at a guesthouse. Dae-hyeon, who had a complex about his thin physique, became a symbol of male hatred on the Internet. These two are hurt by becoming targets of hatred among various people gathered at the guesthouse, but they understand and comfort each other.