In the thriller The White Storm 2: Drug Lords <掃毒2天地對決>, Andy Lau (劉德華) and Louis Koo (古天樂) play two opposing characters who share a complicated history.  Although the two stars fight head-to-head in the movie, Andy and Louis are good friends off-screen and collaborated in several movies together. Playing the role of characters on the wrong side of the law, the two actors share how they worked together effectively.