In a dystopian world of war in the future, a group of soldiers, including Tinda, face a brutal clash with an enemy that has advanced technological means at its disposal. After a series of dramatic explosions and dangerous missions, their unit goes through horrific combat conditions and human losses. Tinda, being one of the few survivors, reaches the intercepted information of the enemy about a supercomputer called Hetman, which conducts military operations with extraordinary precision. The final conflict, the stakes of which are the lives and fates of soldiers and civilians, reveals the dark side of war - not only their fight for survival, but also the unethical actions of their commanders. When Tinda discovers the truth about the Gambian plan of Hetman, she gains the determination to oppose the ruthless decisions of her superiors. In the finale, faced with betrayal, the soldier makes a drastic decision in order to prevent further crimes. Derivative is a story of courage, sacrifice, and moral turmoil in a time when technology and human nature intertwine in dangerous ways. Who is truly enemy and who is friend when war turns the code of ethics upside down?