When 13-year-old Emma bumps into her old friend Abby on the bus one Saturday afternoon, she later realises that she was the last person to see Abby before her mysterious disappearance.

Amidst the media frenzy and everyone's struggle to come to terms with the possibility of Abby's death, Emma starts a terrifying journey of her very own, as she uncovers things that lead to a discovery even the police have not thought of-A thrilling and memorable novel for readers of all abilities from 10 years up.