On January 1st, Hitagi Senjyogahara makes a phone call to Deishu Kaiki, her supposed archnemesis. It was a tough decision made on her part, in order to save herself and Koyomi Araragi from their “death sentence.”

Kaiki, deciding to accept Hitagi's work request, visits the town where Koyomi and his friends live. He starts to do research on Nadeko Sengoku, the junior high school girl turned god of North Shirahebi Shrine, who is the current target of deceit.

Kaiki meets Nadeko Sengoku face to face at North Shirahebi Shrine. Nadeko's personality became a lot brighter once she became the snake god, and she starts to talk to Kaiki in a carefree manner about how she was going to kill big brother Koyomi soon...

Kaiki heads to North Shirahebi Shrine daily in order to deceive Nadeko the snake god but finds himself being followed on his way home. Furthermore, he gets a mysterious threat telling him to “pull out of this case.”

Tsubasa Hanekawa, supposedly overseas in search of Meme Oshino, suddenly approached Kaiki to talk to him. After exchanging information with Tsubasa, Kaiki gets the finishing touches ready for his preparations to deceive Nadeko the snake god.

Kaiki proceeds to deceive Nadeko Sengoku. However, Nadeko with surprising ease sees through Kaiki's lies and attacks with numerous white snakes. What will be coming last out of the tongue of a con artist near death–a lie, or the truth?