Requests from the owners of the Chinese restaurant "Ohira Shokudo" in Itabashi Ward, Shigeyuki Ohira (Yukijiro Hotaru) and Yoshie (Narumi Kayashima), come into the "Clear Stream Project". It all started a few days ago. Ryo Arisu (Hidehiko Ishizuka), a ramen critic, has been enjoying tanmen at "Ohira Shokudo", which he attends every month for 20 years, and the couple tells him that he will soon close the shop. Although he is prosperous, he has no successor and wants to retire considering his age. Arisu, who does not want to lose his favorite store, persuaded the couple to ask "Clear Stream Planning" to find a successor.

Tatsumi Serizawa (Kyoka Suzuki) will be appointed as the head of the ramen section of the upcoming global Japanese food culture event "Japan Food Summit 2020". Kengo Kawakami (Tetta Sugimoto), who eats wrinkles instead of Serizawa, who is busy preparing every day, is in a state of exhaustion. On the other hand, Aya Natsukawa (Maryjun Takahashi) was given a chance to develop monthly ramen from Serizawa, but she was worried because she couldn't do what she wanted.