AS FEATURED BY ASSOCIATED PRESS, STREETINSIDER, NEWSBREAK AND AFFILIATES OF CBS, NBC, FOX, and ABC. THREE FRIENDS. ONE PORTAL. NO RETURN. Alex, Tilly, and Max never meant to step through an ancient portal. But with no choice, they're hurled into an otherworldly realm with alien skies and strange creatures. Days later, they're racing through underground catacombs beneath medieval Rome while a violent, dangerous and power-hungry giant of a man named Luigi Romano hunts them with ruthless ambition . It's a breathless chase where high stakes meet quick wits and split-second ingenuity. For Alex , it’s about keeping his friends alive. For Tilly , it’s the greatest adventure of her life. For Max , it’s the worst field trip ever, especially when his home-made inventions keep backfiring in spectacular fashion. Danger, chaos, and laugh-out-loud disasters follow them through every hidden chamber and crumbling passage. Can they outsmart their powerful enemy , or can they stay one step ahead by using their very own “future Nobel Prize winner’s” whacky inventions to buy time to get away? Step through the doorway but be warned, once you begin, there may be no way back.