There is a light that must never be lit... When the TARDIS runs aground in the ancient realm of Morning, the Doctor learns that a powerful force has reemerged. A lamp filled with a mythical substance known as Hooklight has been discovered - and this could mean the end of everything. A great quest begins against the forces of chaos, encompassing many new friends and foes. Without their ship and without each other, the time travellers will be tested on their journey to the Dark Forge. And not everyone will survive...