Neil and Bree, brother and sister, come to visit their aunts in a small town for the summer. The guys learn about an abandoned hospital, Greylock Hall, and decide to go there with new friends. After all, there are rumors that the ghost of a nurse lives in Greylock, allegedly involved in the deaths of teenage patients. However, all this happened many years ago, and Neil and Bree are in no danger... Until they actually meet a ghost, a woman in white! Now she is chasing them, the brother and sister begin to have nightmares, and a lot of strange things are happening around them. The ghost clearly wants to tell them something, but how can ordinary teenagers help? Neil and Bree decide to find out what exactly happened at the asylum so many years ago. But they could not even imagine that the abandoned hospital held the key to solving an old crime, and not only “Greylock” reliably guards secrets.