The loneliness of an immigrant child. The shadow of an unsolvable mathematical problem. And four destinies intersecting around one table.

Umut is a Turkish university student growing up in Germany. Obsessive, antisocial, and chaotic... But a fire flickers in his mind: one of the greatest riddles in the world of mathematics, a problem that has remained unsolved for years. To crack it, he buries himself in notebooks, in the night, and in his own solitude.

Yet, no path is walked alone. When he meets Clara, Jonas, and Margarethe, Umut's table transforms from a table of isolation to a table of search. Each of them carries their own fracture; with music, with silence, with fears... But the thing that unites them is an invisible line: the critical line of zeros.

Woven with genuine methods, real formulas, and the profound anguish of an authentic mathematician, this novel explores not only an unsolvable problem but also the cracks deep within the human spirit.

As you read, you will ask yourself this question:

"What if they actually solve it?"

And perhaps you will find the answer not in the lines, but on the edge of your own heart.