At school, Fumio is good in everything. His cheerful, out-going personality makes him a great favorite with teachers and classmates alike. He is in perfect health and there does not seem to be a single shadow to cloud his life. Then, one day, he feels a sudden pain in his shoulder. His parents take him to a doctor who tells them that their son has bone cancer and must be hospitalized. The parents cannot believe their ears, for Fumio had always been the picture of abounding health. The whole family with the exception of Fumio is cast into the depths of despair. They wonder why it had to happen to their Fumio and their happy family. The father who recovers first and decides to fight cancer to save his son's life.