In 1985, Kyogoku is an unconventional but passionate to the point of over-eagerness detective who has solved many cases. He corners a violent criminal called Kagura, but at that moment, a bomb planted by Kagura explodes and Kyogoku slips into a coma for 30 years. One day in 2015, Kyogoku suddenly wakes up and visits his wife, Kanako. However, she has remarried and rebuffs him. Just at the moment he is behaving violently, he ends up getting arrested by a young detective, Mochizuki Ryota and brought to Yokohama Chuo Police Precinct where he is reunited with his former junior Suzuki and boss Kujira. Kyogoku quickly returns to his position as a detective. However, he cannot comprehend the latest gadgets and the new wisdom. He keeps ignoring modern rules without a care and getting Ryota, who has been made his buddy, into trouble.