Under the Nagasaki Sky

Shimizu Kadota is in her 3rd year at Nagasaki University. She still lives with her parents and enjoys a relatively happy life. She is a member of an athletic club at school and dating medical school student Kota. One night, Shimizu has an argument with her mother. Her mother suddenly dies from a heart attack. It happened so quickly, Shimizu is stunned. She then feels heavy guilt over ignoring her mother's phone call.
Meanwhile, Saori Takamori's only daughter died 1 year ago. She can't get away from the sorrow of her lost. Saori's family has been Catholics for over 300 years. Saori's mother Takie and her father Ryoichi try to overcome the loss of their grandchild as part of God's will. One day, Saori discovers that she is pregnant. She immediately has two thoughts. She's afraid she might lose her child again and she wants to have a child again. Saori's husband Hiroyoshi tries to console her, but she still can't help stop thinking about her lost child.
By chance, Saori and Shimizu meet around a Catholic Church. They learn of the loss in each other's lives and understand what the other person feels. Can they move on?