Doubt

Tae Su's tenacity makes him South Korea's top profiler. But his work gets in the way of being a parent, especially when his daughter is a suspect. (Source: Netflix)

Tae Su wants to trust his daughter, but all evidence points to Ha Bin. He draws suspicion from Officer Dae Hong, who begins investigating the case. (Source: Netflix)

New revelations emerge as Tae Su investigates Ha Bin's alibi, while Eo Jin begins to question Tae Su's involvement in the case. (Source: Netflix)

After Tae Su submits a keychain as evidence, the police discover a link to another case. Yeong Min is brought in for questioning once more. (Source: Netflix)

Tae Su receives a shocking call as secrets begin to tumble out. Agitation and suspicion over the unfolding investigation begin to mount. (Source: Netflix)

While Dae Hong is disappointed with the changes in Tae Su, Eo Jin learns about her colleague’s past. Ha Bin reaches a breaking point with Yeong Min. (Source: Netflix)

Another murder forces Tae Su to question his daughter as the evidence points to her involvement. Jun Tae turns himself in. (Source: Netflix)

A mysterious envelope arrives at the station. Ha Bin learns her mother's secret, while Eo Jin's suspicions grow. (Source: Netflix)

Tae Su helplessly watches as the homicide team homes in on Ha-bin as their suspect — and faces a shocking reality when her belongings are confiscated. (Source: Netflix)

The killer is revealed, but the motive is unclear. Ha Bin's fixation on the case continues while Tae Su's guilt consumes him. (Source: Netflix)