Meikyu Sousa (2015)

Detective Yoichiro investigates the brutal murders of three family members and discovers a five-year-old boy hiding in the closet. The child's presence triggers painful memories of Yoichiro's own childhood, when his parents died in a fire. With no leads, the original case goes cold. A year later, a new murder occurs – a mother and son are killed. Evidence at this crime scene connects it to the unsolved murder from the previous year.