Based on the true story, I SWEAR is a moving, uplifting account of the life of John Davidson, a Tourette syndrome campaigner who grew up with the condition in 1980s Scotland, at a time when it was little known and misunderstood. Featuring outstanding performances from Robert Aramayo, Peter Mullan, Shirley Henderson and Maxine Peake, I SWEAR is a frank, funny and touching story about the transformative power of friendship and community.