Detective Hikari goes undercover with her male junior officer to capture the mastermind behind a drug trafficking ring. Trapped in a sweltering, air-conditioner-less room during the peak of summer, they endure seven grueling days of sweat-drenched abstinence. Pushed beyond their limits, the mounting tension finally breaks as they cross the line into forbidden passion. Despite being on duty, they lose all restraint, their bodies entwined in a feverish, sweaty embrace, exchanging fluids in intense creampie sex. As the mission nears its end, Hikari realizes she has fallen deeply for the raw, authentic pleasure she experienced—and finds herself unable to forget the feelings that emerged during their desperate encounter.