The Time Detectives: The Mystery of Maddie Musgrove

When Joe Smallwood goes to stay with his Uncle Theo and cousin Maya life seems very dull, until he finds a strange smartphone nestling beside a gravestone. The phone enables Joe and Maya to become time-travelling detectives and takes them on an exciting adventure back to Victorian times.
Can they prove maidservant Maddie Musgrove's innocence? Can they save her from the gallows?