In the year 1971, former Korean Air Force fighter pilot Tae-In (Ha Jung-Woo) works as a pilot for a commercial airline. He faces a crisis inside a hijacked flight with the passengers, including Yong-Dae (Yeo Jin-Goo), and his crew members, including Captain Kyu-Sik (Sung Dong-Il) and Flight Attendant Ok-Soon (Chae Soo-Bin).

Time has passed since the contaminated water from Fukushima was released into the ocean. Youngnam flies to Jeju Island to clean up his old house. There, he is reunited with his old friend Yurim, who is cleaning up marine debris with her colleagues.