Need to flesh out characters: Tzoulia could be a skilled hacker with a past, her plus 2 allies. Mavroi as a shadowy corporation. The story could start mid-action, in the middle of the hack, with urgency. Maybe include some personal stakes, like a past betrayal or family connection to Mavroi. The climax could be the successful download with a twist that reveals more conspiracy, setting up for a sequel or leaving a lingering mystery.