The Harbinger is an outcast with the ability to command nanites drawn from the Ash — a residual atmospheric energy left over from ancient wars fought in the desolate land around the Golem Gates. Ancient warrior machines spawn from those gates in endless waves, and an unseen force pushes the Harbinger toward confrontation. Golem Gates is a real-time strategy game in which the Harbinger uses the Ash to summon units from a card-based deck and battles through the mystery of who created the golems and why they are still fighting.