Not One Less

13-year-old Wei Minzhi, who can barely read or write herself, is chosen to take over her impoverished village's one-room schoolhouse when its sole teacher must suddenly leave for one month to care for his ailing mother. Warned not to let a single student drop out over the course of his absence, Wei keeps a stern eye on her students, especially Zhang Huike, a bright but naughty 10-year-old boy. When Zhang doesn't show up for school one day, Wei is determined to go into the city, find him and bring him back.