Complex sentence: What they find is a stash of heroin, hidden in the cabin by drug traffickers led by (Garret Dillahunt), when the criminals suddenly descend upon the cabin, Joe and his father must make a kill-or-be-killed stand for survival.
Split into simpler sentences: What they find is a stash of heroin, hidden in the cabin by drug traffickers led by (Garret Dillahunt). When the criminals suddenly descend upon the cabin, Joe and his father must make a kill-or-be-killed stand for survival.