The Thirteenth Reunion (1980)
Also known as:
Hammer House of Horror (part 1)
Macabre events befall a journalist (Foster) when assigned to write about a slimming course. The ghoulish horror proceeds to a shuddering climax after she has probed the mystery of limbless bodies and meets those who have assembled for a reunion of victims of an air crash in the Atlas Mountains. What really lies behind luring plumpish girls and men to a strange health farm?