Retirement was boring. Saving the galaxy is terrifying. Marnie, 78, just wanted to finish her quilt. General Kairo, 82, was content feeding pigeons in the park. And Elara, 76, simply wanted to organize her library before her memory faded completely. But the Universe had other plans. When the glittering "Invitation" arrives, the three elders are whisked away to the Arena Ultima—a cosmic coliseum run by the ageless, arrogant Stewards. The rules are simple: Fight to the death, and the last team standing wins the Prime Boon, a wish that can rewrite reality. To survive, they are gifted the Atavist Harness , a device that turns a lifetime of practice into a weapon of mass destruction. Marnie doesn't just hem pants anymore; she stitches the fabric of spacetime. Kairo doesn't just remember old battles; he calculates the geometry of victory before the fight even starts. Elara doesn't just sort books; she "files" incoming missiles into a temporal void. They are the Grey Titans . But as they battle cyborg wolves, gravity-wielding accountants, and weaponized pop stars, they discover a horrifying truth. The Harnesses aren't free. They run on fuel. And the fuel is memory . To save the future, they must burn their pasts. With their minds fading and the Stewards preparing for a harvest of souls, Marnie, Kairo, and Elara must rely on the one thing they have left: each other.