Steve Coogan and Paul Rudd star as Erasmus and Paul, a bickering gay couple whose life is turned inside out when a ten-year old boy shows up at their door claiming to be Erasmus' grandson. Neither Paul, nor Erasmus, are ready to give up their extravagant lifestyles to be parents, but maybe this little kid has a thing or two to teach them about the value of family.

A seemingly wholesome and benevolent family, the Parkers have always kept to themselves, and for good reason. Behind closed doors, patriarch Frank rules his family with a rigorous fervor, determined to keep his ancestral customs intact at any cost. As a torrential rainstorm moves into the area, tragedy strikes and his daughters Iris and Rose are forced to assume responsibilities that extend beyond those of a typical family. As the unrelenting downpour continues to flood their small town, the local authorities begin to uncover clues that bring them closer to the secret that the Parkers have held closely for so many years.