Peter and Kyle Reynolds have always been close brothers, not only are they twins but a family loss at a young age also made them closer. The man are now grown up now and their mother (Helen) is about to re-marry. Her two sons travel to her wedding and she decides to tell her boys the truth behind what happened to their father.
From a young age Peter and Kyle have both believed that they lost their father to colon cancer and as such, Peter even formed his career around his father's illness as a way of dedication to his memory. What their mother tells them takes them both by surprise; she doesn't actually know who their dad is, he could be one of many people that she had a relationship with.
The brothers set off on a mission to find out who their dad really is, there's a famous sport star and a tattooed hothead (who Kyle feels is quite similar to Peter) both of whom might tell the brothers more information about their mom than they ever need to know.