Many years-and an epic battle-have passed since we last saw our Guardians. The battle claimed Sombra's freedom, but it also caused one of the Guardians to change forever. Nightlight, one of Catherine's closest companions, became Jackson Overland Frost or Jack Frost. Over time, various events occur: two world wars and the Great Depression. But a greater evil lurks. All the Guardians have a feeling, especially Jack. And he is the only one who can stop...

Nicholas St. North, a daredevil swordsman seeking treasure in the fiercely guarded village of Santoff Claussen finds, instead, the great wizard Ombric Shalazar and a battle against the Nightmare King and his evil Fearlings--a battle Nicholas can win only if he finds five other Guardians in time.

After Nightlight, a Guardian, transforms into Jack Overland Frost, he is entrusted by Father Time with a great secret, but he must revisit his past if he is to understand the secret and defeat an old enemy who threatens the world with destruction.