Hitsujido Honpo, an established Japanese-style sweets company known for its traditional flavours and reliability, has maintained a modest popularity. To win a new segment of customers, it has embarked on new business development. The leader of this team of five young employees is 28-year old Kudo Mayuko (Takahata Mitsuki). Mayuko was headhunted by the current CEO Okazaki Kengo (Maruyama Tomomi), for her achievements in her previous job. However, she struggles with the difficulty of new business development and pressures within the company. One day, a “new” 68-year-old employee Niimoto Kazuo (Kusakari Masao) is assigned to be Mayuko’s subordinate all of a sudden. She is dumbfounded to learn that he is 40 years her senior and even feels anger. Mayuko is confronted with the question of whether he should do the old job he was proud of? Or a new job as a brand new employee, and assumes the role of mentor.
Taishi lives with his father Kazushi. His mother left home when Taishi was very young and he barely has any memories of her. He believes that his mother left home to study in Paris. His favorite moments come once a week when he receives a letter from his mother. But one day, during Taishi's summer vacation, he learns that his mother isn't in Paris but in Shodoshima, Japan. Taishi then decides to take his pet dog with him and bicycle from his hometown of Yokohama all the way to Shodoshima. On his 500 kilometers trip to Shodoshima, Taishi meets various peoples and touches their hearts, while leaving behind small miracles. What Taishi doesn't know about his mother is that she suffers from memory loss and that's why she lives apart from her family. Taishi's father Kazushi soon learns that his son has left for Shodoshima and he sets out to find his son.
Young Furuhata, a 3rd-year junior high student from Tokyo, transferred to a school in the countryside due to family circumstances. He doesn't fit in at first, but he eventually gains a reputation as a detective and opens his own detective agency. One day, he hears about the town's legend of buried treasure, and he immediately begins unraveling the mystery.