In the peaceful realm of Azeroth, the human civilization faces an unprecedented threat as a fearsome race of invaders—orc warriors fleeing their dying world of Draenor—arrive to conquer new lands. Led by the powerful warlock Gul'dan, who wields a dark and destructive magic known as fel, the orcs construct a portal called the Dark Portal which connects their worlds. With the intention to capture humans to sustain the portal until the orc Horde can pass through, the two worlds are brought to the brink of all-out war.

Human forces, led by the noble Sir Anduin Lothar, respond to the threat with fierce resistance, and the kingdom's protectors seek any means to halt the orc invasion. Amidst the escalating conflict, an unlikely bond begins to form between Lothar and a half-orc, half-human warrior named Garona, who finds herself torn between loyalty to her people and the growing realization that peace between humans and orcs might be possible. As both sides race against time and face mutual destruction, leaders and champions from each faction must confront their own inner demons and decide the fate of their kin.