The Bay Mirror is covering the grand reopening of Mural House, a San Francisco landmark built in the 1920s, and Phoebe invites her sisters to attend. Piper's got her hands full with P3, but Paige happily tags along to see the once-famous artists' colony that housed great art, passion, and scandal. Notable for all three is the story of the building's architect, William Lancaster, who, during the construction, fell in love with an artist -- a young divorcée named Isabella Marshall. Their relationship was tumultuous at best, eventually ending in tragedy...and in William's disappearance.

The hoopla surrounding Mural House's reopening has made William and Isabella's love affair legendary. With the permission of Isabella's daughter, Lucile, Phoebe has been reprinting the couple's love letters in her column. She joins Lucile, now an elderly woman, at the gala's main event -- the unveiling of a long-painted-over mural. Lucile is visibly upset when the mural is revealed; in fact, she seems horrified. Before passing out from fear, she whispers, "The evil has been released..."