讲述的是小时候因为遭遇事故而失踪的孙女，十年后再次和奶奶相遇的故事，充满了令人流泪的感动，她们身上的秘密也令人好奇。
影片讲述了小时候扔下自己走的母亲快要临终了 医院给女儿打电话，女儿原本不想去看母亲但最终还是去了 然后明白了母亲有多爱她讲述了母亲和子女之间的故事。
Dong-goo, a lowlife thug, has always been living a hopeless miserable life. One day, he accidentally obtains a bankbook with such a large amount of money as much as one billion won. He travels down to Busan in order to try to obtain the PIN number for the bank account. As Dong-goo meets the eight year old boy, Bok-gi (Jo Won-bin), who believes Dong-goo is his dad, and the boy’s mother, Ae-sook (Hong Ah-reum) in Busan, their story begins.
韩国演员裴宗玉、李源根及池允浩出演的影片，影片《换季》主要讲述一位母亲得知儿子与朋友之间的秘密后，三人之间的故事。演员裴宗玉将在影片中饰演母亲美婧，池允浩将饰演儿子秀贤，李源根则饰演秀贤的朋友勇俊
