Hakuro's father died when he was a child allowing his mother to re-marry into the wealthy Yagami family. Although Hakuro was also welcomed, he struggles to feel a part of this family. His younger half-brother, who possesses the same blood as him, has fared much better. After the death of his mother, Hakuro dropped the Yagami surname and parted ways with the family.
Hakuro, now a veterinarian, has a strong sense of justice, is sincere and has a weakness for beautiful women. One day, he is approached by such a woman, claiming she is the wife of his half-brother. She worriedly informs him that his half-brother has gone missing, leading the pair to team up and find his whereabouts.
In the process, Hakuro finds himself reluctantly embroiled in the Yagami family's battle over one sizeable inheritance. Could his half-brother's mysterious disappearance be connected?
Based on novel by Keigo Higashino.