After the invasion of the so-called "Angels" - gigantic, almost indestructible beings resembling winged gods, Great Britain has fallen underground - literally. Humanity has fled to underground cities, protected by layers of steel and concrete. Daylight has become a memory, and the surface is patrolled only by machines - giant mechs, called "Bots", controlled by ten chosen ones. You - Elara Price, daughter of Captain John Price - are the pilot of Bot-01, the largest and most advanced combat robot. Your capsule, locked in the heart of the machine, becomes an extension of yourself. Every day you train in the simulator, sweat pours from under the red protective suit, and the echo of the Angels can still be heard on the surface. You have only one task: to survive... and defeat them all. You live with your father and his team in a modest house in one of the inner layers of the Underground, where military rigor reigns, but also quiet hope. Price, although dry and hard, cares for you deeply - he knows that he would lose everything if you died.