PARK CITY, UTAH Jan. 23 (UPI) -- The Incomer, which premiered Thursday at the Sundance Film Festival, is a whimsical comedy of very specific culture clashes. While the film is steeped in Scottish folklore, the comedy is universal.

Isla (Gayle Rankin) and Sandy (Grant O'Rourke) are siblings who live alone on a small island off Scotland. Their late father tasked them to protect the island from incomers.

Daniel (Domhnall Gleeson) arrives as an incomer from the Northeastern Scottish Council to evict them. His very presence brings the modern world, just as he is baffled by their isolated life.

Before Daniel's arrival, Isla and Sandy are quirky and innocent. They train to fight incomers by attacking burlap sacks.

They find sex toys washed ashore and don't know what they are. They catch and kill their own food.