When a mysterious tower appears in the skies over England, thirteen strangers are pulled from  their lives to stand before it as a countdown begins. Above the doorway is one word: ASCEND.

As they try to understand why they’ve been chosen and what the tower is, it soon becomes clear the  only way out of this for everyone is… up. 

And so begins a race to the top with the group fighting  to hold on to its humanity, through sinking ships, haunted houses and other waking nightmares. Can they each  overcome their differences and learn to work together  or does the winner take it all? What does the tower want of them and what is the price to escape?