小翔（毕晓海饰）从小被母亲（郝蕾饰）所遗弃，他和父亲相依为命，但不幸的是，父亲也离开了他，无奈之下，他只好再次来到母亲身边。新的家庭让小翔很不舒服，特别是他在面对性格有些阴郁的继父（戴立忍饰）时，他总是有一种不寒而栗的感觉。

让小翔感到奇怪的是，当年跟母亲一起离开的哥哥却失踪了，谁也不知道他去了哪里，哥哥的消失已经让小翔感到难过，再加上继父给他带来的不好感觉，小翔的生活也变得忧郁起来，得不到家庭温暖的他却在愤世嫉俗的小混混（纳豆饰）身上得到关怀，他也跟着这个小混混四处游荡。小翔的老师（关颖饰）得知哥哥失踪的事后，进行了特别关注，而警察（梁赫群饰）也开始介入这件事，小翔开始凭借记忆画出了一张张肖像，大家开始有了小翔生活的轨迹轮廓，在第四张画中，他们发现了惊人的秘密。

Xiaoxiang (played by Bi Xiaohai) was abandoned by his mother (played by Hao Lei) since he was a child. He and his father depended on each other, but unfortunately, his father also left him. , In desperation, he had no choice but to come to his mother again. The new family made Xiaoxiang very uncomfortable, especially when he faced his stepfather (played by Dai Leon), who had a somewhat gloomy personality, he always had a chilling feeling

What makes Xiaoxiang feel strange is that the elder brother who left with his mother back then disappeared, and no one knows where he went , the disappearance of his brother already made Xiaoxiang feel sad, coupled with the bad feeling brought to him by his stepfather, Xiaoxiang's life also became depressed. ), he also wandered around with this little gangster. Xiao Xiang's teacher (played by Guan Ying) paid special attention to his brother's disappearance, and the police (played by Liang Hequn) also started to intervene in this matter. In the fourth painting, they discovered the surprising secret.