Conversation so far:
What did Kate Tsui do of note in 2012?
2012 is arguably Kate Tsui's peak year in her TV career. She starred in the Hong Kong television crime drama series, Highs and Lows.
What TV program did Kate Tsui appear in, in 2012?
In 2012, Kate Tsui appeared in the TV program High and Lows

Question: What was the premise of the show?
Self-contained rewrite: What was the premise of the show Highs and Lows, starring Kate Tsui?