A young married couple makes a huge mistake by agreeing to participate in a secret swingers' party in their suburban neighborhood, and soon both of them are being targeted by a jealous and homicidal neighbor.

Caroline and Margo respond to a "Missed Connections" ad on Craigslist, only to realize that there whirlwind romance was a trap, and the man of her dreams is leading a secret life. The Two women join forces to bring down the dangerous con man who simultaneously romanced and duped them.