“You did well, Samuel,” Optimus rumbled, his voice a tectonic plate shifting. He held the AllSpark, now reduced to a cube the size of a basketball, cupped in his massive hands. It pulsed with a light that seemed to hum under the skin, a silent frequency of creation.

Major William Lennox had seen raw recruits, scared civilians, and battle-hardened enemies. But Sam Witwicky, standing in the shadow of a dying alien robot the size of a silo, was a new category entirely. A scrawny, motor-mouthed teenager who had just translated the key to the war on Earth from a pair of vintage glasses.

Sam nodded, watching the last trace of light fade. “Yeah,” he said, finally allowing the tears to fall. “They always do.”

“Time is up,” Ironhide snarled, cannons deploying.

Lennox’s ears were still ringing from the battle of Mission City. The acrid smell of melted asphalt and burnt ozone clung to everything. In the center of the devastation, Optimus Prime—the towering, red-and-blue leader of the Autobots—knelt on one knee. His optics, usually blazing with the warmth of a campfire, were dimmed to a soft, weary glow.

A roar of jets split the sky. Not F-22s. A different, sharper sound.