“精神状态领先30年”的魔方奶奶赵艳红（杨紫琼 饰）不服老、不认输、不怕事，更爱惹事！遇上“能躺着绝不坐着”的天才废柴吴有为（刘昊然 饰）后与魔方结缘，和师父、闺蜜、家人一起跌跌撞撞勇闯“魔坛”！70岁才拿起魔方的她，能够转出什么名堂？又会遇到哪些奇葩对手和鸡飞狗跳的意外......

The movie is based on the true story of the "Stray Brothers" and focuses on the group of "Children in Difficult Social Situations". The film tells the story of the wandering journey of a "petty thief" older brother and an "orphan" younger brother, and the warmth of their guardianship and redemption. Ma Liang (Wang Junkai), a boy who wanders alone, meets Xuan Xuan (Guan Zifeng), a child who has been forgotten by his family and has no one to take care of him. Similar destinies have brought the two lonely teenagers closer and closer, and in the midst of the wind and rain, they set up a small home together, embracing to keep each other warm and to protect each other. However, an accident breaks everything, a group of uninvited guests intruded into their lives, Ma Liang and Xuan Xuan's fate and what will happen ......

乱世，一书生为救其爱妻将自己的心灵留在了长生当。多年后，当他试图找回逝去的自我时，他发现自己已经深陷在永恒的历史轮回中。