The brave lonely girl Su Chenchen met the hot-tempered Murphy, the timid and cowardly Tian Tian, and the warm-as-sunshine Lan Yin in this strange city. Together, they searched for the source of campus bullying and accidentally uncovered a murder case that occurred in 17 years. It turns out that their encounter was not an accident, but an inevitable result of cause and effect. The four teenagers redeemed each other in each other's youth and grew up together.
Concept: Youth has pain, regrets and growth