Chronicles the adventures of Fi Phillips, a 13-year-old girl fascinated by paranormal mysteries; her 15-year-old brother Jack; and Molly, their rock star mom, in their home on wheels -- a custom touring bus -- as they travel across the United States. Also along for the trip is Jack and Fi's friend, Clu Bell, his dad, Ned, who acts as the band's roadie and his mom, Irene, who is the band's manager. In each city the tour visits, Fi encounters and explores various mysteries of the paranormal. Fi attempts to solve these mysteries using the website she created, "Fi's So Weird Website," to gather clues and information. For the third season, the group is joined by Annie Thelen, the daughter of an old friend of Molly's.