Haven Town is facing total annihilation at the hands (and teeth) of a horde of monsters from beyond the Shadowrift.
You, the heroes, must band together to drive them back. To do this, you will need powerful spells, skills, attacks and loot. When the game begins, you are a basic hero; you can explore and fight. Luckily for you, Shadowrift is a deck-building game! You can buy new cards to add to your deck, cards that will define you as an adventurer and complement the strengths of your fellow heroes. Unlike other deck-builders, there is constant interaction with your fellow players as you figure out who will gain which benefit from the limited supply of townsfolk, offer their coin to help construct walls, and seek healing from anyone who's learned such magic.
Shadowrift also features monsters that don't merely sit waiting to be slain; if you leave them alone, they will rip Haven Town asunder. Since the monsters won't stop coming until the last Shadowrift is sealed or the town has been built into a mighty fortress, you'll need every boost you can take.