The story of Torchlight II picks up a few years after the original and follows the journey of the Alchemist, a playable character class from the original Torchlight. The old heroes lay defeated by the hand of their former comrade in arms, the Alchemist. The Alchemist has been corrupted by the Ember Blight from Ordrak's heart and has set out to cure himself.

All the while not concerning himself with who gets in his way or what drastic measures he has to take to achieve his goal; in the process, disturbing the balance of the six magical guardians. A new group of heroes arrive to answer the call to overcome the horrors left behind in the Alchemist's wake, and to stop him before unleashing an even more terrifying evil upon the world of Torchlight.

Torchlight II's story is told in three major chapters and one minor, four in total. The average solo playtime will range between 20 to 30 hours, depending on your difficulty. The playtime is guaranteed to change when you increase the difficulty and the amount of people who join you in co-op, sure the minions will become more difficult but the loot will be even more rewarding. The loot rewards vary with the distance between you and the other players, so make sure the group you run with can stick together.