Missing

A divorced, workaholic mother fighting a custody battle for her daughter Da-eun. She becomes wrapped in a dangerous web after hiring Han-mae, and her dogged pursuit of Da-eun exposes her to deception and danger. Her resilience drives the investigation and tests her trust in others.

A young woman who poses as a relative and later emerges as the mastermind behind the missing-child plot. She is revealed to be the mother of Jae-in, involved in organ trafficking, and willing to go to extremes to secure a future for her child. Her deception shades the whole case with moral ambiguity.

Ji-sun's ex-husband and Da-eun's father; his status and in-laws complicate the custody case. He disappears and is later linked to the hospital and financial dealings surrounding the case, hinting at deeper familial conflict and tragedy.

An infamous organ trafficker who becomes entangled with Han-mae’s schemes; he reveals how money and coercion drive illegal adoptions and transplantation. His role is pivotal to uncovering the darker aspects of the plot.

A pragmatic detective who pieces clues, questions Ji-sun, and leads the investigation. He balances professional duty with empathy for the family, driving the case toward its emotional climax.

The mother-in-law who pressures Ji-sun and participates in the family dynamic that complicates the custody dispute. She represents the traditional expectations and tensions within the in-law network.