The team has traveled the world, faced unbelievable dangers, seen what others have only seen in nightmares. Now, Tank, Brenda, Andi, Daniel, and Chad face their greatest challenge ever-a challenge that might cost them everything. Trapped in a tunnel deep below the Antarctic ice, Tank must lead his friends in an impossible mission. Picking up where INTO THE BLUE left off, the team must overcome their own fears, the dark, and a soulless being as old as the Earth itself. Survival is doubtful; success is a must. The future depends on it.