In Neverwinter Nights 2: Mask of the Betrayer, players are
transported back to the Forgotten Realms shortly after the events
detailed in the original Neverwinter Nights 2. Following the
climactic battle against the King of Shadows, the player awakens
alone and stranded deep beneath the earth. Surrounded by a horde
of evil spirits, the player embarks on an epic adventure that
reveals his true destiny.

Set in harsh, spirit-rich Rashemen, near the powerful nation of
Thay, Neverwinter Nights 2: Mask of the Betrayer will present
players with an exciting new campaign; epic levels; dozens of
new feats and spells; new races, base classes and prestige classes;
new companions; new weapons, armor and crafting options; hordes
of new monsters; and enhanced modding tools.