Sundance film festival: The actor is a charming presence in the otherwise overly twee and consistently unfunny tale of isolated siblings dealing with a visitor

Once upon a time, two siblings lived on an abandoned Scottish isle, isolated from the modern world and suspicious of all outsiders. The siblings, a brother and sister, believed themselves to be descended from the gulls that peppered the island’s scenic cliffs; they also believed, on some level, that they too were gulls – or, at least, they acted like it, flapping and squawking about.

Debauched fairytales like these loom large over The Incomer, Scottish writer-director Louis Paxton’s odd and aggressively quaint first feature, which asks a high conceptual buy-in of its audience. From the first shots of Isla (Gayle Rankin) and Sandy (Grant O’Rourke) caw-caw-ing like birds and beating sacks labeled “incomer” with clubs, Paxton commits to an askew, often alienating angle of humor – quirky, at times juvenile, a touch dark, altogether difficult to settle into for anyone with an aversion to twee.

The Incomer is screening at the Sundance film festival and is seeking distribution