mhsato27
At MIT, Professor Hale has spent a lifetime chasing a question most scientists won't touch: what if time isn't a wall-but a surface you can index?
Under the cover of a legitimate university lab, Hale and his doctoral assistant quietly build something that shouldn't exist, funded by a wealthy benefactor no one is allowed to name. Their machine doesn't send a body into the past. It sends a presence-a tethered observer-threaded through an aperture of computation so narrow it can only hold for seconds.
The rules are brutal. The farther back you go, the more the calculations explode-Earth's motion, atmospheric drift, the shifting geometry of cities, the chaos of unknown perturbations. Past a narrow window-less than sixty years-the odds turn lethal. And even within the safe range, the tether can only hold for thirty to ninety seconds before the link destabilizes and the consequences become catastrophic.
They tell themselves it's harmless. You can only watch. You can't touch. You can't speak. You can't change anything.
Until the data comes back... wrong.
A flicker in the signal. A tug on the line from the other side. The unmistakable sensation that the past is not as passive as it should be-and that something, or someone, may be noticing the observer.
Because if time can be visited, it can also be contested.
And the first rule of Tether is simple:
If the line breaks, you don't just lose the traveler.
You lose what's still human on the end of it.