Back to the 17 year old high school campus, cool summer and Mao bright with dissatisfaction with each other, to face the campus life, but found that has been misfits. Cool summer "bright" and no restrictions of any kind "Mao adult thinking", also let two people frequently make a joke, get general turmoil. In the conflict stricken or confrontation, two people are determined to change the fate of the people around, to help everyone find a positive direction in life. Two people with the tacit understanding, be in full swing of the mettle, but in the process to find the understanding and feeling of heart. Once again across the 28 years old, the butterfly effect is quietly happening, the two also took the beginning of the heart to re start......

回到17岁的高中校园，凉夏和茅亮带着对方的不满，重新面对着校园生活，却发现已经格格不入。凉夏的“百无禁忌”和茅亮的“成人思维”，也让两人频频闹出笑话，弄得鸡飞狗跳。在饱经啼笑皆非的矛盾对抗后，两人决心改变身边人的命运，帮每个人找到积极的人生方向。两人默契配合，热火朝天的大展身手后，也在过程中重新找到了对彼此的理解和心动的感觉。再次穿越回28岁，蝴蝶效应正在悄然发生，两人也带着初心重新启程……