The Charmed Ones are attending the grand reopening of Mural House, a San Francisco landmark built in the 1920s. But the house has a history, a tumultuous love affair between the architect, William Lancaster, and a young artist named Isobella Marshall, which ended in tragedy - and in William's disappearance. Now their legendary love affair is going public and their letters are being printed in Phoebe's column, and with the unveiling of a long-painted-over mural, it seems that the house's history is once more in the present as a new evil is released...