A luxury cruise ship hosted a party for a prominent politician. A man with a keen sense of smell detected a terrorist who was hiding a bomb. Shinichiro Hanaoka (Hiroshi Abe), who solved the case with his special sense of smell, was known as “Sniffer” at the FBI in the United States.

A series of sniper attacks occurred in broad daylight in an office district. The crimes were committed by a professional sniper who targeted his victims with a rifle from the roof of a distant building.

A masterpiece by a genius painter is to be returned from Germany. Hanaoka (Hiroshi Abe) invites Yuki (Haruka Igawa) to attend a preview for the press, but he claims that the painting is a fake based on its smell.

Hanaoka (Hiroshi Abe) is asked by the leader of the True Love Sect, Teruko Tokudaiji (Hitomi Kuroki), to keep something a secret. It was to find the perpetrator of a murder that had occurred within the sect.

The secret child of popular news anchor Goro Kashima (Taizo Harada) has been kidnapped. The perpetrator is demanding 100 million yen and wants Kashima to confess to an extramarital affair on tonight's news program.

Hanaoka's (Hiroshi Abe) daughter, Misato (Kahou Mizutani), is arrested on suspicion of murder. Hanaoka goes to the police station with Emi (Yuka Itaya), but Detective Onishima (Toshinori Omi), who is in charge of the case, refuses to discuss the details.

Hanaoka (Hiroshi Abe) confesses his feelings to Yuki (Haruka Igawa), a female doctor, and invites her to his home. However, she does not show up at the agreed time.

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A series of mysterious murders breaks out. Scent detective Shinichiro Hanaoka (Hiroshi Abe) smells a mysterious scent from the bodies. Meanwhile, Tatsuro Komukai (Teruyuki Kagawa) is removed from the investigation team and replaced by Kana Shichijo (Haru), a profiler trained by the FBI.