A young artist gets stranded in an extensive, immaculate forest in western Ireland, where, after finding shelter, she becomes trapped alongside three strangers, stalked by mysterious creatures each night.

When Joan’s husband dies, she is shocked to discover he had invented an elixir which makes the drinker look young again. Sharing it with her two friends, the three women paint the town red but soon discover that they are no longer equipped to be young in the modern world.