The London Murder Mysteries - Death of a Chimney Sweep

Alfie knew who it was the moment he saw the body under the gas lamp. Joe the chimney sweep.
No one else seems to care about the death of a poor boy, but Alfie has reason to believe that Joe was murdered. So he and his gang will risk their lives on the rooftops of London and brave the dark, dangerous world of the chimney sweeps, until they uncover the deadly truth.