Oskar's school teacher raises the alarm. Oskar's mother is abroad, and he has been left in the care of friends, but has been arriving in school hungry, unkempt and with bruises on his arms, legs and body. Experienced foster carer Cathy Glass is asked to look after him, but as the weeks pass, her concerns deepen. Oskar is far too quiet for a child of six and is clearly scared of something or someone.

When foster carer Cathy Glass is asked to foster Darcy-May, a two-day-old baby, she is very concerned. The baby is coming to her straight from the hospital and will have no contact with her teenage mother, Haylea. Even more worrying, she will be brought to Cathy with a police escort, as it’s vital her extended family don't know where she is.

Aneta and Filip, the children’s parents, are distraught when their children are taken into care. Aneta maintains she is innocent of harming them, while Filip appears bewildered and out of his depth. It’s true the family has never come to the attention of the social services before, and little Kit and Molly appear to have been well looked after, but Kit has a broken arm and bruises on his face. Could it be they were a result of a genuine accident, as Aneta is claiming?

Damian is just seven when he is taken in by foster carer Cathy Glass. His mother, Rachel, loves her three young children dearly, but she is vulnerable, naïve and unable to cope on her own. Cathy sets about helping Damian overcome his eating issues, with the hope that he will eventually return home. But when Rachel’s new boyfriend, Troy, arrives on the scene, Cathy becomes deeply concerned. She soon realises that Damian and his siblings are in great danger.

When Stevie’s social worker tells Cathy, an experienced foster carer, that Stevie, 14, is gender fluid she isn’t sure what that term means and looks it up. Stevie, together with his younger brother and sister, have been brought up by their grandparents, as their mother is in prison. But the grandparents can no longer cope with Stevie’s behaviour, so they place him in care. Stevie is exploring his gender identity, and like many young people he spends time online. Cathy warns him about the dangers of talking to strangers online and advises him how to stay safe.