The film is based on a true story where Lilian Lui, former headmistress of an elite kindergarten in Discovery Bay whom originally planned to retire to travel around the world with her husband Alvin Tse, takes up a job with a monthly salary of HK$4,500 to continue educating five remaining pupils single-handedly in Yuen Long's Yuen Kong Kindergarten, which was on the verge for closure in 2009, and puts her travel plans on hold.

It grossed HK$46.6 million at the Hong Kong box office and became the highest-grossing domestic film of 2015 in the territory.

Feeling disillusioned with the education system, she quits her high-paying job as a principal and plans to travel around the world with her husband Tse Wing-tung (Louis Koo).

Student Ka-ka's father (Philip Keung) was crippled during an accident and is often threatened by property developers with eviction; Mei-chu's parents were killed in a traffic accident during a thunderstorm night, with Auntie Han (Anna Ng), a restaurant employee, as her only guardian; Siu-suet's mother was not approved for Hong Kong residency and lives with her elderly father Mr. Ho (Richard Ng), who sells metal scraps for a living; Pakistani sisters Kitty and Jennie's father does not see a need for girls to study, so when school bus prices increased, he simply did not allow his daughters to go to school anymore.

[6] As per mixed review, Derek Elley of Film Business Asia gave a score of six out of ten praising the performances by the cast and criticizes the lack of real drama and conflict.