If you knew you were going to die, you'd do anything to live. Wouldn't you?

After the death of his cousin, 16-year-old Bull's had time to move on. Despite Grace, despite music, he's finding it harder to cope. Lewis understands what it's like to be sick but he's not the friend he once was. If he gives up the one thing that has kept him going, will it be enough to save him? Can anyone catch Bull before he falls?