A high-school teacher in 1983 and a detective in 2015 join forces through their dreams to change the perilous fate of the woman they both love—30 years apart.

Tae-su, a detective fighting organized crime, returns to his hometown for his high school friend Wang-jae’s funeral. There, he meets his old friends Pil-ho, Dong-hwan and Seok-hwan and they reminisce….