In the spring of 1987, When 12 year olds Wren Starr and Celeste Michaels meet and become best friends after her mothers incarceration causes her to move in with her Uncle Nick. Celeste is dealing with issues of her own as she is watching her mom Miriam slowly die from cancer, spending almost a year become closer than either girl has ever been to anyone. Things change for the worst for them after they are kidnapped and held captive for three days after sneaking out to go trick or treating, Their escape isn't the most interesting part of their story, it's everything that happens next. How do you go back to normal when you discover that monsters are real and they can be anyone?