The Ship of Theseus.

At the age of 10, Shin Tamura’s happy family life was torn apart when his policeman father was sentenced to death and imprisoned for murder. Now, some 30 years later, Shin is determined to prove his father’s innocence by solving the mystery at the heart of the case. Finding himself transported back in time, Shin must uncover the shocking truth, change the past, and restore his family’s happiness.