A 5-year-old boy, Ethan, is brought to Casey in the middle of the night after the sudden death of his young mother after a drug overdose. Estranged from her parents, Ethan’s mum had been abused by her ex-partner, and began taking drugs to cope. Ethan is obviously lost and bewildered, and regularly wakes up screaming for his mum in the night. He begins to lash out at other kids at school and his behaviour becomes more volatile.

Three siblings arrive at Maggie's door after being taken into care. Teachers of eight-year-old Bobby spotted bruises while he was getting changed for PE and his dad, Lee, and stepmother, Brianna, have been uncooperative and hostile to Social Services. While they investigate, Bobby, as well as Brianna's daughters, Melodie and Poppy, are all placed in Maggie's care. But as the children settle in, a thought won't let Maggie go. While Melodie and Poppy are clean, well-fed and immaculately dressed, Bobby is pale, severely underweight and crawling with lice.

Harley, 13, has been sectioned under the mental health act after attempting suicide. She was spotted climbing the railings on a footbridge that crossed a busy motorway and pulled to safety by a member of the public. After six weeks in hospital, social services are looking for a short-term placement so she can be kept safe while family therapy takes place. Harley has a family - a widowed mother and an older sister, Milly, who left home with her long-term boyfriend just over a year ago.

The Watsons are no strangers to sibling placements, but when Casey takes the call from her supervising social worker one frosty January morning, she can instantly tell from the tone of her colleague’s voice that there’s a complicated case ahead. And she’s right. A four-day-old baby boy called Tommy - born in prison - plus his four-year-old half-brother, the lively Seth. A month later, the very moment she gets out of prison, the boys’ mother - a 19-year-old called Jenna - also follows.

Struggling to cope with three young children, Janie turns to experienced foster carer Cathy Glass. Helping the family each morning, Cathy soon uncovers how dangerous their situation has truly become. Riley and his two little siblings, Jayden and Lola, are not safe at home. With all three children in her care, will Cathy be able to rebuild their lives – and Janie’s?