Rachel and Matt inadvertently book a vacation on a swingers cruise and wind up swinging with their best friends. It didn't destroy their marriage, but it did change them in unexpected ways. Now, they do something they would never have considered before boarding the ship, swing with a couple they just met. For better or worse, Rachel and Matt explore swinging with a new couple and it could change everything. The new couple is everything Rachel and Matt are not. Rich, open, and players, they are very experienced in the lifestyle. He is big, muscular, and body-obsessed. She is fit, sexually aggressive, and has had plastic surgery. Rachel and Matt didn't know it before they met them, but they like what they see, like what they do, and like doing it with them. For them, Vive la difference is not just about French cheeses.