Due to some unforeseen circumstances, 19 year old (Mary) is invited to spend the Christmas holiday at her best friend (Cass)'s house. But what will happen when she crosses paths with (Cass)'s 17 year old brother (Finn). He appears standoffish and distant but (Mary) is hell-bent on getting through to him. Will she discover there's more to him than meets the eye? or will he push her away?