Hundreds of doors.
Thousands of worlds.
A million miles away from home.

They thought they could handle it. They thought they understood the rules. They were wrong.

Teenagers from Earth, refugees from Shattershard and twins from the Collegiate - connected in ways they're only beginning to discover. Trapped in frozen wastes or ensnared by intrigues, they're all finding themselves new lives on new worlds.

When identities shift and the rules change, allies can become enemies. But enemies might be friends. When you're in deep trouble and you need help, who do you turn to? Who can you trust?