When Kenna Trigg plays with an Ouija board, little does she know that she is about to unleash a malevolent spirit upon the world, leaving her and her older brother, Jake, to stop the spirit as it leaves a trail of dead bodies in its wake.In The Invocation, a supernatural thriller that combines elements of Stranger Things and The Exorcist, Kenna Trigg and three of her friends from the fourth grade manage to befriend a spirit named Mia, who died in her late teens in a drowning accident, using of an Ouija board. Cotter, a malevolent spirit who had been a con-man and criminal in life, tricks Kenna and her friends into releasing him into our world by posing as Mia. Cotter has the ability to take control and possess people he comes across. With this new power, he begins a vicious crime spree. Kenna turns to her older brother, Jake, a professional mixed-martial artist who has recently been released from prison. Now, Kenna and Jake must stop Cotter from unleashing havoc in our world.