After nearly 50 years of marriage, Katherine McIntyre has decided she no longer wants a roommate. But after a session with Mistress Carmalita in front of 1000 women, she resolves to give romance one last shot. Make that sex. What could have turned into a night of epic lovemaking devolves into a frantic call to 911 for an erection that lasts longer than four hours. Way longer. When Katherine and Henry's six children return to the roost, old rifts are exposed, secrets are shared, and everyone sees a little about each other that they would have been happy to never have seen. Mister Happy Accident is a family dramedy, reminiscent of The Family Stone, The Descendants, with the touch of Father of the Bride.