One day, a promising high school baseball player gets killed. A detective woman named Kyoko is incidentally asked to track down a missing his brother Shinya from their father. To clear him of suspicion, she probes into the murder with her detective father and pet dog. Around the same time, some incident comes up in a pharmaceutical company. A man named Yuki, who has a grudge against the company, threatens them about their drug development in the past. The company hides a big secret. . . The two cases intertwine with each other?