Set in Hashima, Nagasaki Prefecture and modern Tokyo in 1955, when the coal industry was developing rapidly, it tells a grand story of love, friendship and family destiny spanning 70 years.

From a macro perspective, it tells the story of Japan's changes from the post-war revival period to a period of rapid economic growth, and from a micro perspective, it shows the family bonds, various aspects of the world, youth and love over the past seventy years.

At the same time, it clearly points out that modern Japan has everything at first glance, but it is an era when young people have no dreams and looks for hope to the present from the past.

“Aren't you willing to marry me?”Summer 2018, Tokyo.

One day, Lingo (Ryunosuke Kamiki), a male publicist who works in a nightclub, is suddenly proposed to by the old lady Izumi (Nobuko Miyamoto) whom he just met.Izumi took Lingyang to the male PR club and spent a lot of money on him.Lingyang thought that she had met a generous guest with good conditions, so she accepted Izumi's invitation with a relaxed mood and traveled to Nagasaki.The two people on the ferry gradually approached Hashima, and Izumi finally confessed her feelings...

In the spring of 1955, Hashima, Nagasaki Prefecture.Teppei (Kamiki Ryunosuke), the son of coal miner Ippei (Kunimura Hayabusa), returned to Hashima after graduating from college as an employee of Washiba Mining Company, which took over the island's coal mining industry.His childhood playmates Kensho (Shimizu Hiroyuki) and Yuriko (Tsuchiya Tao), who graduated from the same university as him, also returned to the island.Tieping's brother Shinpei (Taku Saito), the island's canteen's waitress Asako (Sugisaki Hana), Tieping's mother (Nakajima Tomoko) and others were all happy for Tieping's return to the island, but Ippei was furious.Incessantly.Moreover, Tatsuo (Kizuki Sawamura), the father of the wise general who is an employee of Washiha Mining Company, seems to have his own views on his son's employment.

At the same time, the mysterious beauty Lina (Elisa Ikeda) comes to Hashima.Faced with Lina, who claimed to be a singer, Tie Ping and others gradually became interested...

At this time of rapid industrial growth, people on the island are full of hope for the future, which is in sharp contrast to modern Tokyo, which is filled with a certain sense of occlusion.Spanning 70 years of time and space, the story of two young people in different places begins -

Curious Reo (Ryunosuke Kamiki) wants to know who the person Izumi (Nobuko Miyamoto) calls "the unforgettable person" who is similar to herself.Under Ling Yang's inquiry, Izumi began to tell her past with Teppei (Kamiki Ryunosuke), whom she once admired, as well as her complicated love story on the island.

September 1955.On Hashima, Asako (Hana Sugisaki) looked at Teppei with complicated emotions.Teppei invites Rina (Elisa Ikeda) to play together, worried about her safety.Rina, who is aware of Asako's feelings for Tieping, is also avoiding Tieping's affection for her, and has mixed feelings in her heart.

On the other hand, in order to participate in a discussion meeting on the Hashima domestic water diversion project-the submarine waterway plan, Yuriko (Tsuchiya Tao) brought Kenji (Shimizu Hirunya) to Nagasaki.Yuriko fell in love with “square dance” which was born in the United States at first sight and decided to bring it back to Hashima.She immediately summoned Teppei, Asako, Kensho, and Reina to start practicing the square dance.At this time, a large typhoon is about to arrive near Hashima...

In order to create a good working environment for the miners, Teppei (Kamiki Ryunosuke) and Xianjiang (Shimizu Xunya) did their best in their own way.The suggestion of miner Shinpei (Takumi Saito) also came into play, and as a result, with the active efforts of the two men, the new company housing system was realized.

As the seasons changed, the time came to October 1957.Finally, Hashima had running water.New miners' apartments and elementary and middle school buildings have also been completed. Hashima's population and coal production are increasing, and it seems that it is about to usher in its most prosperous period.

Against this background, the sequel to the movie "The Burning Island" that was previously filmed on Hashima began to be produced, and producer Natsu Yagi (Shigawa Kiyohiko) came to the island.Natsuyagi enthusiastically expressed his desire to film the now vibrant Hashima Island into a movie, and announced that actor auditions will be conducted targeting islanders.Everyone was immediately excited. Among them, Asako (Hana Sugisaki) was also called by Natsu Yagi to audition, and she began to quietly practice her acting skills.

On the other hand, in modern times, Ling Yang (Kamiki Ryunosuke) suddenly came to Izumi's (Miyamoto Nobuko) home and met Izumi's family for the first time.Izumi introduced Reo to her family as her fiancé...