Black Light (2021)

Plot

Following a tragic car crash that results in one death and another person in a coma, the surviving victim is blamed for the incident. Plagued by guilt, Hee-ju, the deceased man's wife, finds it difficult to cope. As she delves deeper into the circumstances surrounding the accident, she uncovers unsettling details about the victim's past, revealing a previous suicide attempt. This discovery leads her to question whether the collision was truly an accident or a deliberate act, prompting her to launch her own investigation into the truth.