When 28-year-old artist Mina finds shelter after getting stranded in an expansive, untouched forest in western Ireland, she unknowingly becomes trapped alongside three strangers that are watched and 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.