With no clue how he came to be imprisoned, drugged and tortured for 15 years, a desperate man seeks revenge on his captors.

After 8-year-old So-won narrowly survives a brutal sexual assault, her family labors to help her heal while coping with their own rage and grief.

All unemployed, Ki-taek's family takes peculiar interest in the wealthy and glamorous Parks for their livelihood until they get entangled in an unexpected incident.