In the midst of a fierce battle against enemy forces, ace pilot Iris becomes separated from her unit and is swiftly overpowered. Transported to the occupied city of Mirion, she is confined within a heavily guarded facility where resistance is met with severe consequences. A powerful collar is fastened around her neck, designed to detonate upon any attempt at escape. With her freedom now tethered to this ominous device, Iris must weigh her next moves carefully amid the uncertain dangers ahead.