The Amazing Mr Blunden (2021)

For modern teenagers Jamie and Lucy, though, adventure arrives in the form of a mysterious old man, Mr Blunden. He offers them a job, as caretakers to a ruined old house that's said to be haunted. Once they move in, Lucy and Jamie explore the grounds and meet two more kids - Sara and her younger brother, Georgie. But there's something unusual about them. They're ghosts. Or not quite. Sara and Georgie have used a potion to travel two hundred years into the future in search of help. They're convinced that the evil Mr and Mrs Wickens plan to murder them for Georgie's inheritance!The old man, it seems is the key to it all. With his help, Lucy and Jamie must travel back to 1821, save their new friends, set history back on its proper path and redeem their remorseful new friend, the Amazing Mr BlundeN.