Thirteen-year-old Andrea Talbot doesn't want to go to Moose Jaw for her cousin Vanessa's wedding. She's going to miss a really cool bike trip and she's not taking it very well. At a family dinner party in a local restaurant, Andrea agrees to look at what she thinks is just a phony tourist attraction - tunnels beneath the streets of Moose Jaw. Legend has it that in Prohibition days the tunnels sheltered crooks, maybe even the notorious Al Capone himself! Andrea scoffs, until she has a small accident with a mirror at the tunnel entrance and wakes up in another time. Unable to return to the present, Andrea is caught up in a dangerous underground adventure. A teenage boy, Vance, finds her a job - working as a courier for the very criminals whose existence she dismissed - including their menacing leader, a man she knows only as Scarface. When she overhears information about a police raid, Andrea has to decide what to do. Should she help Scarface escape? Or should she help Vance, who is running for his life after a run-in with Scarface? And whatever she decides, will Andrea ever get back to the present?