Something strange is in the air... First a mysterious parcel arrives for Rowan, containing an engraved medallion on a golden chain. Then an odd-looking young man turns up at the house, and something in the air tells Rowan to be suspicious... Something else is in the air too - the ghost of Lady Maisie! The brave 250-year-old spectre's powers are fading, but she is determined to help Rowan solve the mystery.