"Rodman" (quite an engaging effort from James Franco) is doing a bit of experimentation on apes to try and find a way to treat his ailing father's Alzheimer's. It's when one of those goes bonkers and is killed that he realises that she had recently given birth. He retrieves the youngster and rears it at the home he shares with dad "Charles" (John Lithgow). It's all going fine until "Caesar" spots ...