In the docuseries *Nog één week* (One More Week), we follow children in the run-up to a major event that will change their lives. Each episode focuses on one of the children, following him or her in their daily life during the week leading up to the exciting event. Together with parents and friends, they look forward to it. Sometimes it is fun, sometimes exciting, sometimes sad, sometimes difficult. How do they cope? What do they find difficult, and what do they not? In this way, you see that every child experiences something in his or her own way.
Ryuichi and Kotaro are brothers who lost their parents in an airplane crash. They're taken in by the chairman of Morinomiya Academy, who lost her son and daughter-in-law in the same crash, on one condition: Ryuichi has to babysit the kids at the daycare room in the school! This room was opened to help the school's teachers who had kids to take care of, but it suffers from a lack of staff until Ryuichi becomes the first member of the babysitter club formed to solve that problem.
Hayato Hayasugi (his last name is a pun on the words for "too fast") and other children will serve as conductors to pilot the Shinkalion. The Shinkalion robots are various models of real-life Japanese bullet trains (shinkansen) that transform into robots to fight an unknown evil to protect the safety and peace of Japan.
The children must work together with the adults of the Shinkansen Ultra Evolution Institute (SUEI) to defeat a monster that looks like a jet black bullet train.