Thirteen-year-old Conor and his mum have managed just fine since his dad moved to America. But now his mum's very sick and she's not getting any better. His grandmother won't stop interfering and the kids at school won't look him in the eye. Then, one night, at seven minutes past midnight, Conor is woken by something at his window. A monster has come walking. It's come to tell Conor tales from when it walked before. And when it's finished, Conor must tell his own story and face his deepest fears.