Chapter 4: The Double Cross

The sixth lock shattered their alliance completely. It presented a choice rather than a puzzle. The screen displayed a simple message: One person may bypass this lock by entering their six-digit number. That person will receive sole access to the vault contents. The others will remain sealed in the corridor. Silence stretched through the hallway like a held breath. Five people stared at the keypad, each remembering the number on their invitation card, each calculating the odds. Lian moved first. She crossed the corridor in three quick strides and positioned herself between Tomasz and the keypad. 'No one enters anything,' she said firmly. 'This is a test. Every mechanism so far has required collaboration. This one is designed to see whether greed can override seven hours of teamwork.' 'Or it is the first honest moment in this entire exercise,' Tomasz replied. 'Perhaps collaboration was the obstacle, and individual initiative is the real solution.' Maren studied the lock mechanism with her architect's eye. 'Lian is right. Look at the wiring. The keypad connects to the same integrated system as every other lock. Entering a single code would not bypass anything. It would trigger a penalty, probably the permanent failure that the countdown warned us about.' Devonte ran the logic. 'A game theory trap. The dominant strategy appears to be betrayal, but the actual payoff matrix rewards cooperation. Classic design.' 'Except we cannot be certain,' Yuki said quietly. 'That is what makes it effective.' They debated for forty minutes while the clock consumed precious time. In the end, it was Tomasz who walked to the keypad and pressed a single button marked with a zero, the null response. The screen flickered. Correct. The sixth lock opened and the seventh mechanism revealed itself. It was the simplest of all: a plain steel handle attached to the vault door, requiring nothing but the collective decision to pull it. Together, they reached for the handle.