Complex sentence: The film displays a lighthearted and comic attitude toward Coke Ennyday's use of cocaine and laudanum, while he catches a gang of drug smugglers, he does so after consuming most of their opium.
Split into simpler sentences: The film displays a lighthearted and comic attitude toward Coke Ennyday's use of cocaine and laudanum. While he catches a gang of drug smugglers, he does so after consuming most of their opium.