Kazuko Yamase is an emotionally battered 23-year-old casual part-time worker after losing her job and being dumped by her boyfriend. One day, she buys a knitted teddy bear that she fell in love at first sight. When she gets home, the bear suddenly starts talking. The former owner of the bear is a 5-year-old child whose parents were murdered. For some reason, the spirit of Amano Yasuo, a middle-aged detective who was killed in the line of duty while investigating this case, is in the bear. Kazuko and Amano quarrel, but put their minds together and set out to shed light on the case that Amano was pursuing while alive.