讲述了帅气的外科医生吴景昊（李逸男 饰）为弥补青春遗憾，在一个偶然的机会下重新回到高三时期，改变自己懦弱的性格，重新感受身边的友情、亲情。去发现那些被他忽略的青春中的种种细腻与温馨，并帮助女同学韩菲（庄达菲 饰）一点点放下防备、解开心结，捡拾起青春中散落的纯粹与美好的故事。

帥氣的外科醫生吳景昊（李逸男飾）為彌補青春遺憾，在一個偶然的機會下重新回到高三時期，改變自己懦弱的性格，重新感受身邊的友情、親情。去發現那些被他忽略的青春中的種種細膩與温馨，並幫助女同學韓菲（莊達菲飾）一點點放下防備、解開心結，撿拾起青春中散落的純粹與美好 。

A handsome surgeon tries to make up for his biggest regret. When he earns the chance to go back in time to his senior year of high school, he strives to overcome his cowardice to help his classmate Han Fei and prevent an impending tragedy.

Ever since Han Fei unintentionally helped Wu Jing Hao out of a sticky situation in school, she has never left his line of sight. Wu Jing Hao begins to notice everything about Han Fei, that she is often distracted in class and impossible to get close to as if she had spikes like a hedgehog. Wu Jing Hao eventually learns that Han Fei once took her friend to eat barbecue, yet an accident resulted in her friend being burned and falling into a coma. Han Fei has lived in guilt since then. Wu Hao Jing patiently stays by as he encourages her to step out from the shadows.