"Yes, yes, yes!!"

"What boss?"

"I have the perfect model. The simulations all agree. This time, it will work. The tesseract is there."

Dr. Demantine's faithful assistant scurried across the bare floor of the massive printing machine. The money was good. What did he care if the goal was never going to happen? Guaranteed income in this day and age of failed endeavors was a precious dream for most.

The proposed printed instructions glowed in a green somewhere between emerald and lime. He could almost scent the fruit. He wondered if Tessa knew, like he did, that it would never work. A physical model of a tesseract could not exist. A product of the mind, not to be created physically, it was a mode of travel available to a few exalted time travellers over eons of history.

One appeared a year ago and described the process to Tessa.

The computer attached to a genius brain which could not survive in the body it was born in. Thank you, Elon, for the nuerolink and its humble beginnings. Her unlimited access to the solar array on the moon where she lived, kept up with the dream.

She and Demantine were peas in a pod there.

Obsessed.

He shrugged and went to check the inventory. They had enough of the raw materials to be beginning and shipments were arranged from three sources for the next year. An interminable wait. Not the first one.

Tessa's disembodied voice tickled at his ears. There was something about it which irked him. Too soft, too seductive, and her own choice. Demantine was under her spell, but he held the kill switch. Someone had to have control of this disastrous experiment.

He was it, and he wondered if he would survive to stop the insanity of attaining perfection if it finally happened.