The story line

My story line starts with a happily married husband (Dan) and wife (Sarah) out on a walk. He goes to a party with out his wife and cheats on his wife and she finds out that this has happened. The wife turns psycho and goes after the woman that her husband cheated with she tries to kill her and follows her. The husband must decide to stop his wife and save his lover or let his wife enact her revenge and keep his wife. The wife then turns on him and he ends up in deep trouble not knowing if he will live or die.