In Frost City, the discovery of an unknown high heat source triggers alarms as even the city's noble weapons sense rising temperatures. The executioner, a powerful defense mechanism, loses control and activates an indiscriminate annihilation mode, threatening widespread destruction. Amid confusion and urgency, the characters face the escalating danger as the heat source's origin and nature remain unclear. The episode ends with the city on edge, grappling with the unraveling defense system and the looming threat the uncontrolled executioner poses to everyone nearby.