Tatsuya Kawakami's mother becomes a member of a religious group after her husband commits suicide, and makes a large donation to the organization. Her three children are forced to live in poverty, and her eldest son, who is blind in one eye due to illness, takes his own life. Kawakami comes to believe that the religious group has ruined his life, so he creates a homemade gun and carries out an assassination plot against former prime minister Shinzo Abe, who has close ties to the religious group, which has been accused of siphoning off money from its members.

After the death of her husband Kenichi, Natsuko is discovered to have a talent for baseball by Shigeno, the manager of the grass baseball team "Tamagawa Mets. This marks the end of her life as an ordinary housewife who had been a chaste wife. In order to pay off the debt left by Kenichi, Natsuko becomes a pitcher for a grass baseball team, and as she trains hard with Shigeno, she becomes obsessed with the pleasures of baseball. Accompanied by her sister-in-law Haruyo, a professional baseball scout named Furuta, and other characters with one or two peculiarities, Natsuko makes her way through her life...