The manned Mars expedition is about to end, and the expedition team has only one day left to return. But one of them is unwilling to give up and decides to stay and look for evidence that can prove the existence of life on Mars. A major discovery appears before his eyes, but tragedy also happens. The surface collapses and he falls into an unknown abyss. The scientists stay to save their colleagues. However, another person disappears. Could the life on Mars that they discovered really exist?