After nearly a hundred years of service, the Mercy Falls Children’s Hospital is closing its doors for good. It seems that the local authorities have detected a strange deterioration of the building’s structure. During the next three weeks the remaining patients will be transferred to London hospitals. But the process is taking longer than expected. A series of rainstorms has grounded the helicopters in charge of transporting the patients and a bizarre case of children's bones breaking for no apparent reason are making everyone afraid of something intangible, invisible. Something that shouldn’t exist. Something full of pain. And hate.