Ji-woo, an outcast at a prestigious private school, meets Hak-sung, the school janitor who is actually a mathematical genius who defected from North Korea.

Unable to remember anything about his life, a man begins regaining consciousness in a new body every 12 hours. Now, he must piece together his identity, all while evading attacks…

To acquire ancient artifacts for a private collector, a cunning grave robber and his band of ingenious thieves carry out a series of risky heists.