After decades apart, childhood friends Nora and Hae Sung are reunited in New York for one fateful weekend as they confront notions of destiny, love, and the choices that make a life.

When Maya learns her father Sam was once a spy, she suddenly finds herself at the center of an international conspiracy. As she seeks answers, Maya herself becomes a target and must quickly learn the skills of her father.

Due to sudden deteriorating weather conditions, visibility on the Airport Bridge is severely impaired, leaving people stranded and at risk of the bridge collapsing due to a series of chain collisions and explosions. Amidst the chaos, the canine subjects "Echo" from the military experiment "Project Silence," who were being transported in secret, break free, and all human survivors become targets of relentless attacks.

Siwoo, a high school student, is timid and fragile. His only hobby is taking a picture of his daily life with a camera. However, Ha-joon and his hobby, motorcycle, come to Siwoo, who nobody is interested in. "Break" begins to occur in Siwoo's daily life.

A girl wakes up in a huge secret laboratory, then accidentally meets another girl who is trying to protect her house from a gang. The mystery girl overthrows the gang with her unexpected powers, and laboratory staff set out to find her.