The New Yoshiwara pleasure district, in the twilight years of the Edo Period. Popular prostitute Asagiri will soon be freed from her indentured service. One day at a local festival, she meets young artisan Hanjiro which changes her destiny. Asagiri feels love for the first time in her life, but history involving Hanjiro's client leads to tragic circumstances.
The ST team at the Tokyo Metropolitan Police Department consists of eccentric members. Akagi works as an analyst on the ST team. He won't appear in front of others, but his colleagues trust him as a leader. Yurine is tasked to manage the ST team. He experiences difficulties in dealing with the team. Meanwhile, the ST team come into conflict with other detectives at the police department over an indiscriminate gun firing case and a grotesque murder case. This forces Akagi to appear in front others. Akagi and Yurine work together to solve the case.