Season 1

Oh In-joo turns to a work friend for help when an incident with her mother leaves her cash-strapped. Oh In-kyung digs into a four-year-old case.

After discovering Jin Hwa-young’s surprising secret, In-joo comes to suspect a finance director to be the culprit of the murderous scheme.

In-kyung causes a scene at a party celebrating Park Hyo-rin’s win in a contest. In-joo heads to a mental hospital to deliver an orchid and seek advice.

In-joo and In-kyung start new jobs and dig deeper into unanswered questions. Sang-a takes a sudden trip, inciting a surprising reaction.

In-joo and In-hye debate what to do with a shocking piece of evidence. In-kyung contends with fallout from a media firestorm.

Reeling from recent events, the sisters must look further into the past in hopes of finding the truth. In-kyung unlocks a secret. In-joo hatches a plan.

In-joo travels abroad and receives an unexpected welcome, leading to more questions. In-hye and Hyo-rin attempt to help Sang-a, who's in isolation.

In-joo is in grave danger following an encounter with a mysterious visitor abroad. In-kyung offers to make a deal to save her older sister.

Park Jae-sang faces a threat. With some help, In-hye and Hyo-rin set out to start fresh. In-kyung finds her own way of shining light on the truth.

Jae-sang makes a drastic move. In the aftermath, the sisters face the wrath of familiar adversaries, newly emboldened with great power.