A Simple Secret

Wong Yu Fei was raised by her father, Wong Kwok Ming, a garage owner, after her mother's death, but she was never able to feel her mother's love.
After returning to Hong Kong, Yu Fei discovers that her father often goes out of town during working hours, so she and her best friend V try to find out what is going on. On one of their drone flights, they witness her father entering an old building and discover that her father is hiding a secret involving the "truth of the death" of her mother, Sun Li Jun, many years ago.
(Source: microfilm-music.hk)