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 a grieving teacher, a reclusive artist, and a narcissistic celebrity children's author lead the others in trying 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...