Sergei Voronin, a student at the College of Technologies for the Development of New Planets, found himself in a hopeless situation: four of his friends were brutally killed, he was the only suspect, and ruthless killers were following in his footsteps. The only chance to escape is to enlist in a paramilitary team of “cleaners”, which is immune from any laws and protects its members from any persecution. In return, the recruit signs a contract for service in the underworld... “I shoot, which means I live!” - this became the motto of his unit in the deadly jungle of the primeval world, where the “cleaners” are engaged in an ongoing battle with incredibly aggressive nature for their own lives and the future of the planetary colony. If Sergei manages to survive in this green hell, he will have a chance to uncover the mystery of the death of his friends and punish those responsible.