Rose and Mark have been happily married for 30 years and are now about to become grandparents. They both like to remain up to date with every sort of modern technology. Living in an age of advanced artificial intelligence, they decided to give each other two state-of-the-art cell phones. Upon arrival at the house, Rose and Mark find that these phones are operated via contact lenses that allow for hands-free control. To their surprise, only one set of contact lenses is included. Unable to control their enthusiasm, they each insert one lens and begin a long descent into a dangerous place.