Nongovernmental corporation Olympus organizes colonial missions to Mars for subsequent colonization.

  During the construction of the ship Perseus Ⅰ there was a series of accidents and were identified shortcomings in the planning of missions which shifted the deadlines. It did not allow to complete the construction of the new Perseus Ⅰ ship in time, and Olympus decided to delay the Perseus Ⅰ mission, and use the remaining parts from the first ship to build the Perseus Ⅱ ship. This is allowed to complete the construction of the new ship ahead of a schedule, and launch Perseus Ⅱ first to Mars.

  Upon arrival on Mars, the expedition discovers another, unknown station on Mars. But where did whole crew disappear?