A serial murder by fatal poisoning ushers in the first year of the new Japanese Reiwa era. Arrested as the prime suspect is a police officer. His son, Kokoro Tamura, along with his mother, elder sister and brother are forced into a life of social ostracism and prejudice as the alleged family of a killer. Kokoro’s devoted wife, Yuki, tells him to have faith in his father. Kokoro pays a visit the village and crime scene, he suddenly gets caught in a time warp that sends him back to 1989, the first year of the Heisei era. There, he encounters his father, who is adored by family and villagers alike. Under this new light, Kokoro begins to believe in his father’s innocence and vows to clear his name and restore happiness to the family. But can the bonds of a father and son spark a miracle across time and space? Shocking truths reveal themselves over the 31-year span in a meticulous, hard-boiled mystery delivered on a spectacular, tear-inducing scale.