While investigating a missing girl's murder, Allison experiences more friction with Scanlon after finding a possible link to his late brother. Also, Ariel deals with her siblings' reactions to her leaving for college.
When they have the same dream about a missing homeless man who is the subject of Allison's most recent case, Bridgette and Allison swap personalities, causing mayhem at home, at school and with the investigation
Allison's visions become a vital source of information to the authorities after samples of a deadly disease disappear. Meanwhile, Scanlon thinks he's ready to ask Lynn to marry him, but his plans don't go as smoothly as expected
When Ariel acts strangely, Allison becomes worried that her daughter might be possessed with the spirit of a murdered stripper who wants revenge on her killer.