Blamed by some, hailed as heroes by others, those involved with Fukushima Daiichi face a deadly, invisible threat — an unprecedented nuclear disaster.

With her gloomy demeanor, Sawako has a hard time fitting in. But when an outgoing classmate approaches her, life takes a turn for the better.

Tsumugi Aoba and Sou Sakura dated in high school. They both liked music. After graduating, Sou sent her a message breaking up. She started dating Minato Togawa, a mutual friend. 8 years later, she sees Sou, only to learn he is deaf.