主人公は、冷えた夫婦関係が長年続き、夫との会話もめっきり少なくなった女性・夏子（松坂慶子）。ある日、夫・謙作（船越英一郎）は外出先で命を落とし、ひとりきりになった夏子の前に魔法使い・マリー（黒島結菜）があらわれ、願いを４つまでかなえると言う。夏子は「夫と出会う前の過去にタイムスリップしたい」とリクエスト。夏子とマリーは５０年前に時をさかのぼる。
夏子がそこで出会うのは、若き日の謙作（桐山照史(ジャニーズWEST)）、高校生のころの夏子自身（平祐奈）、存命だったころの父・慎太郎（尾美としのり）たち。夏子は自分の正体を偽って過去の日々をふたたび生き、そして、当時憧れていた教師・中富（堀井新太）と別れることになった本当の理由と、自分が知らなかった夫の隠された真実を知ることになる。時間旅行のさいごに夏子を待つものは？ 夏子が魔法使いに申し出るさいごの願いは…？
Hoshino Natsuko (Matsuzaka Keiko) is an ordinary housewife who has had a chilly, loveless relationship with her husband Kensaku (Funakoshi Eiichiro) for a long time and considerably few conversations with him. One day, Kensaku goes out for a gathering in the neighbourhood but he collapses all of a sudden and passes away. Natsuko is now all on her own. A witch called Yumeno Mary (Kuroshima Yuina) appears in front of her and offers to grant her four wishes. Natsuko requests to travel to the past, to a time before she met her husband. She and Mary go back 50 years. This is where Natsuko meets Kensaku (Kiriyama Akito) in his younger days, her high school self (Taira Yuna), her father Shintaro (Omi Toshinori) who was alive at the time, and other people. Concealing her true identity, she relives the past and finds out hidden truths. What awaits Natsuko at the end of her time travel? And what will she make as her final wish to Mary?
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