Unlike Portal, Portal Second Age had its own storyline. It was set on the Dominarian island of Caliman and focused on the conflicts between the five different peoples (one for each color) that lived on it: the White-aligned kingdom of Alaborn, the Talas merchant/pirates, the Goblins and other mountain-dwellers, the Elves of Norwood forest and the Dakmor Nightstalkers, with the main focus being on the increasing nightstalker attacks on the Alaborn due to the influence of the sorceress Tojira. The story was told exclusively through the cards and was deliberately open-ended, with the idea being that players could construct decks around the different tribes and play out the story in-game.

• Each Portal Second Age Booster Pack contains 15 randomly inserted game cards.

Cards vary by pack. Booster pack packaging varies by product.