Brassheart is a Point and Click adventure game set in the alternative 1920s, inspired by the dieselpunk aesthetics and the classics of the genre.

In the world of Brassheart, Pola Zagórska follows the clues that may provide a way to save her father kidnapped by his own invention, a rebellious supermachine, Valkiria. This powerful difference engine gathered loyal army and relentlessly pursues the goal of mechanizing and militarizing the whole world. It is governed by cold calculation, and all those who oppose it will be in danger. One of such people was Prof. Zagórski, the co-creator of the machine. Before the kidnapping, however, he managed to give his daughter a clue about defeating the Valkiria. The key to stopping the machine's domination may be a mysterious invention called ‘Brassheart' that affects her will.

Pola has to set off on a journey and find parts of the mechanical heart scattered all over the world, for they are her only chance to stop the sinister machine, end the era of mechanical terror and save her father.