A young girl named Nozomi Nanase spent her summer with her grandfather, who was a doctor in a small clinic located in a remote village surrounded by nature. During her stay, she encountered various animals and insects living freely without fear. One day, while exploring the natural surroundings, Nozomi came across lizards that possessed unique cells capable of regenerating parts of their bodies. Her grandfather then guided her through the fascinating world of living organisms and the incredible potential of iPS cells for medical advancements in the future.