Toshiyuki, a nephew, comes to a fishing port to visit his aunt Yumi, a female diver. He was worried that Yumi, who lost her husband a year ago, had lost her spirit, but when he saw her naked body full of life after a long time, he was relieved to find that there was no need to worry... One day, Toshiyuki finds out that Yumi is looking for a new husband. She is approached by men at the port one after another, but is still unable to decide on a partner. Then, Yumi's favorite fisherman, Sasaki, asks her out on a date on a boat...