For Eun-soo, the need for money never stops. It's a relentless string of expenses with her husband's new treatment, her daughter's art class fees, and even unexpected home repairs. James finds out the source of the drugs Eun-soo brought and becomes furious. He tells her to give up all the drugs as it's dangerous, and Eun-soo feels like she's lost all her hope.

After finding Eun-soo's name on a burner phone, detectives Tae-gu and Kyung-do search her home but come up empty. Eun-soo masterfully plays the part of a devoted mother, but Tae-gu's instincts scream that something is dangerously wrong. Some secrets refuse to stay buried.