A married couple who received a divorce settlement lose their memories in an accident. With amnesia, they fall in love again, so their families try to restore their memories to finalize the divorce.

The North Korean defector, who has just settled in the South, is confused by his brother who was separated from the defection process. Ji-hyeok, a Chinese restaurant deliveryman who is having a hard time finding a job due to his criminal record, wants to leave Korea as soon as possible. To raise money for his defector brother, Ji-hyeok, who is involved in a dangerous drug-transport errand, suggests intercepting billions of won of methamphetamine.