TNT is getting into the fantasy game with an ambitious pilot order from Steven Spielberg’s Amblin Television and director Joe Johnston.

The network has picked up Lumen, about a family trapped in an alternate universe. Here’s the pitch: “The famous author of a best-selling series of fantasy books suddenly disappears, and a family of four finds themselves transported to the mystical alternate world that inspired her work. Once there, however, they are plunged into the middle of a war raging between rival magical forces, of light and darkness. Facing peril at every turn, the family must unravel a complicated mystery and uncover some astonishing secrets as they struggle to find their way home.”

The project has some heavy hitters involved, including director Johnston (Captain America: The First Avenger, Jurassic Park III), screenwriter Chris Black (Mad Men, Desperate Housewives), and executive producers Darryl Frank and Justin Falvey (The Americans), James Frey (A Million Little Pieces, Endgame) and Todd Cohen (Ugly Betty), along with Johnston and Black.