Won Jin-ah

After surviving a life-altering collapse accident, Moon Soo and Kang Doo come to heal each other's wounds.

After entering an experiment that was supposed to freeze them for 24 hours, two people are shocked to wake up 20 years later in a changed world.

"Why do we have to run away?" The refunded souls make a return with a plan to strike back at the adults.

At South Korea's premier university hospital, interests collide between a patient-focused emergency physician and the hospital's new director.