Maddie has been convicted of a crime she didn't commit and sentenced to death, and it's up to time-traveling detectives Joe and Maya to prove her innocence
When Joe Smallwood goes to stay with his Uncle Theo and cousin Maya, life seems dull until he finds a strange smartphone nestling beside a gravestone. The phone enables Joe and Maya to become time-traveling detectives, and takes them on exciting adventures back to the past. The two young sleuths must journey back to Victorian times to try and save the life of an innocent girl. Can Joe and Maya save innocent maidservant Maddie Musgrove from the gallows?