The story is set during the high economic development time of the Showa period. Natsu lost her parents during the war so she moves to the Tokachi region in Hokkaido with her foster father who is a dairy farmer. While growing up, Natsu meets a boy at primary school who draws a very beautiful picture of a horse so she becomes interested in animated movies. Upon graduating from senior high school, Natsu moves to Tokyo and joins the budding animation industry in order to fulfill her dream of becoming an animator.
Momone Nagaura lives with her parents, grandfather, and younger sister on an island in Kesennuma Bay, Miyagi Prefecture. In the spring of 2014, Momone Nagaura graduates from high school and moves to the city of Tome. She fails to enter a university. While she tries to figure out what to do with her life, she begins to work as an apprentice of a forest guide. A turning point in her life occurs. A popular weather forecaster from Tokyo arrives. Momone Nagaura walks on a mountain with the weather forecaster. She hears from the weather forecaster that the weather forecaster can predict the future. Momone Nagaura becomes touched by that comment and decides to become a weather forecaster. She studies hard for the exam to become a weather forecaster. With the help of the people around her in Tome, she finally passes the exam. Momone Nagaura moves to Tokyo and begins to work at a private weather forecasting company. Working there, she grows up as a weather forecaster. Several years later, in 2019, a major typhoon approached Japan. To help her hometown, she heads to Kesennuma Bay.
