123Movies. Directed by David Lai, the provocative 80s Hong Kong classic Lonely Fifteen follows a group of delinquent teenage girls and their downward spiral. Spurning home and school for various reasons, four troubled and alienated schoolgirls descend into crime, sex, drugs, prostitution and tragedy. Lonely Fifteen received seven nominations at the 2nd Hong Kong Film Awards and won Best Actress for teenaged lead Becky Lam in her first and only film appearance.