Inventor Iona Dezhneva is creating a prototype of the Zarnitsa electric car, which he equips with a unique high-capacity battery that allows him to travel 1000 kilometers without recharging. For Russia, with its vast distances, an electric car is extremely important. Jonah with his developments can make a revolution in the energy sector. But there are people for whom this is extremely unprofitable. They will try to kill Jonah and steal her brilliant work.