Sapphire and Will vow to love each other forever. But when a car crash ends that dream all too soon, they find themselves separated in an afterlife with zones named after the colours of the rainbow. Determined to find each other, they start an adventurous journey alongside a cast of characters they don't know whether to trust. They finally meet again in the terror-fuelled Red Zone. With the zone's dreaded Soul Catchers intent on taking over the afterworld, Will and Sapphire suddenly face the most dangerous battle of all... Is their love strong enough to survive against the odds?