Three-year-old Lexie, five-year-old Amelie and thirteen-year-old Leo come to Maggie after Leo confesses to a teacher that his mother's addiction problems and her latest violent relationship has left him as the sole carer to his younger sisters.

Maggie welcomes the three children into her home, and is touched by the gentle care Leo shows to the two little girls. It is clear that Lexie and Amelie adore their big brother, and rely on him for comfort and reassurance. But Leo has experienced the neglect and abuse of his mother and her partner for far longer than his sisters, and is struggling with an eating disorder and showing signs of OCD.

When Social Services begin to look at adoptive families for the children, Maggie is horrified when they suggest that the two angelic little girls will have a much better chance of being adopted without their damaged older brother. Knowing the impact that losing his sisters forever will have on vulnerable Leo, they face the ultimate dilemma. Should the children stay together and dash the hope of them ever having a forever family? Or do they sacrifice the close bond between the siblings to give the girls a chance to be adopted?