In the new semester of high school, Chen Yile, Xu Yanting and others became classmates, and their youthful days began with fun and confusion. An accident, the addition of transfer student Zhang Xiaokai quietly changed the class relationship. Academics, friendship, emotions, family and dreams are intertwined, and a group of teenagers collide and grow up in laughter and tears. In the second year of high school, group rifts appeared, incidents escalated, and several disturbances tested everyone's choices and bottom line. In the senior year of high school, true feelings were revealed under the pressure of graduation. Everyone was honest with themselves and looked back on the beauty and regrets of youth. At the finale, everyone drifted apart, but the mark left by youth will never be erased.
