In this highly anticipated sequel to the popular TNT original movie, Noah Wyle reprises his role as Flynn Carsen, the nerdy yet precocious librarian who was called to protect the world's greatest secrets.

After noted explorer Edward Dennison vanishes, a search party led by anthropologist Jonathan Brock embarks on a mission to find him. Retracing Dennison's last known tracks through a secret passage in Alaska--a gateway to the very center of the Earth--the team discovers an underworld tribe of primitive warriors and prehistoric dangers previously unknown to civilization.