Gifted teenager Maeve Hogan is an outsider in her own family. She is the clever one: studious, hard-working and destined for good things. When her sister has a baby with Big, an abusive small-time criminal, she fears the worst for the child's upbringing. While Maeve's mother is content to go along with the charade of happy families, her brother Cian seems too busy trying to figure out his sexual orientation to care. Frustrated, Maeve decides to take drastic action alone to remedy the situation. But sometimes people can be too clever for their own good and her plan goes badly awry with disastrous consequences...