Jessica (Reagan Foxx) is having a wonderful family game night with her husband Rod (Tommy Pistol), her stepson David (Max Fills), and David's girlfriend Amy (Hailey Rose). Everything seems to be wholesome and going great until there's an unexpected knock at the door. Jessica excuses herself to cheerfully answer the door, then gets the shock of her life when she sees another woman (Shay Sights) smirking back at her. It's like looking in a mirror... and it's clear from the horror on Jessica's face that she doesn't like who is looking back at her.

Troy (Max Fills) and his stepsister Rachel (Scarlet Skies) are being scolded by their stepmom Cathleen (Serene Siren), because they're always fighting and have now been suspended from school because of it. Cathleen grounds them as punishment and demands that they use this time to learn to get along with each other. See how they choose to bond with each other by watching Let Me In.