Wan-soo departs with Do-yoon after her mother's death. Meanwhile, Do-yoon investigates "Palseongbok," a key location regarding the Hwain Group's slush fund.

While returning from the welfare center, Do-yoon narrowly saves Wan-soo's life from an explosion. Wan-soo asks for Do-yoon's help to retrieve the original copy of the NOW Foundation's ledger to catch the culprit within Hwain Group.

Wan-soo's brother gets arrested for embezzlement. Wan-soo visits Busan under Do-yoon's protection, but faces another attack.