Komedija o moškem, ki je priča nezvestobi žene svojega najboljšega prijatelja: ali naj mu to pove?Zapriseženi osvajalec ženskih src Ronny in srečno poročeni Nick sta najboljša prijatelja že od šolskih let. Med pripravami na projekt, ki bi jima omogočil ustanovitev lastnega podjetja, Ronny po naključju odkrije, da se Nickova žena Geneva videva z drugim moškim. Ker ne želi prizadeti in izgubiti najboljšega prijatelja, z resnico najprej sooči Genevo, ki pa ne namerava priznati nezvestobe. Ronny med iskanjem poti iz zagate doživlja vedno večje nevšečnosti in zabavne težave.
A man finds out that what you don't say to a friend is just as important as what you do is this story of how far you can bend a brotherly bond before it snaps. Since college, confirmed bachelor Ronny (Vaughn) and happily married Nick (James) have been through thick and thin. Now partners in an auto design firm, the two pals are vying to land a dream project that would launch their company. Ronny's girlfriend, Beth (Connelly), and Nick's wife, Geneva (Ryder), are by their sides. But Ronny's world is turned upside down when he inadvertently sees Geneva out with another man and makes it his mission to get answers. As the amateur investigation dissolves into mayhem, he learns that Nick has a few secrets of his own. Now, with the clock ticking and pressure mounting on the biggest presentation of their careers, Ronny must decide what will happen if he reveals the truth to his best friend.