Aliens have the ability to shapeshift and clone. They’ve never been interested in earth, but a few have been sent down to learn about humans and their traditions for scientific reasons. One alien, Cristos, was assigned to the Besille family. The husband, Dominic, is an abusive drunk. So, Cristos locks him away in a ship after learning everything about him and takes over by disguising himself as him. The wife knows there’s been a change in her husband and has tried to catch it.