Strong Hawk: My Sister's Keeper / (Mod Sub) Artist: Strong Hawk: My Sister's Keeper Format: DVD New: Not in stock $16.01 Unavailable Wish Formats and Editions More Info: Ella, LIV and Vin are sisters who lost their parents as kids and now discover they have powers. They attempt to help their community by acting as vigilantes, but their heroic efforts make them vulnerable to their natural enemies.