The sound of the shrill alarm; a new day has come. Liu Xiao Xiao, who is careless, forget to bring her red scarf and the exercise book, as she skilfully sneaked passed the inspection at the school gate. But the next hurdle proved difficult. The class form teacher is unrelenting, making it compulsory for students who have forgotten to bring their homework, to go back home and retrieve it within half an hour, otherwise it will be considered unfinished work. 

Xiao Xiao hurriedly went back home, but found out that the house is empty. Her mother has found a new work place, and she did not know where to find her. Feeling lost, Xiao Xiao walked along the streets, inadvertently met a group of children of the same age as her, and they spent a wonderful and memorable day...