The Cosmic Cube begins exhibiting unstable and unpredictable behavior inside the Baxter Building, forcing Reed into a race against time to understand its true nature. As he probes deeper into the Cube’s structure, he discovers that it is not a machine, but a growing, evolving, partially sentient construct connected to dimensional energies far beyond conventional physics.

Meanwhile, Thanos exerts his influence across multiple planes, using the Cube’s emergent power to project his presence into Earth’s dimension. The Fantastic Four prepare for direct confrontation, but Reed’s obsession with the Cube’s potential puts him in increasing conflict with Sue, who sees the danger spiraling out of control.

By the end of the issue, Thanos makes his intentions clear: he will claim the Cube, no matter the cost — and Earth may be caught in the crossfire.