2354. During the top-secret government research project "Tree of Life", Earth scientists manage to make a real scientific breakthrough - to create ideal soldiers whose abilities exceed even the wildest expectations, and all thanks to the presence of a predatory animal gene in the DNA. Now the Tree of Life project moves on to the second phase - the genetic reproduction of the created Ultimate Fighters. Betrayed by her boyfriend and sentenced to hard labor for illegal drug possession, Larona, along with other women, is sent on a shuttle to the colonies on Mars. But suddenly it turns out that they are not on Mars, but on the planet Terra Alpha, where women will become part of a research project. Larona was selected for the INBRIED program - and now she will have a child with the Ultimate Fighter. Her body no longer belongs to her, but is the property of the “Tree of Life”. After meeting Thorn, who seems to have no qualms about following the orders of the Tree of Life, Larona falls into despair. Due to Thorn having the highest scores on all tests and having proven himself in battle, he is included in the “INBRID” program - so that his genes will be passed on to the next generation of Perfect Fighters. Other Fighters are jealous of him, because participation in this program means special privileges in his free time from patrolling territories: rest, good food and women. Thorne had no reason to doubt the “Tree of Life”, and especially “INBRID” - a mandatory program that he happily complies, using women to satisfy his own physical needs... But with Larona, everything goes wrong from the very beginning. After her attempt to kill herself, Thorne begins to doubt the Tree of Life. In addition, he develops strong feelings for Larona, which he, being the Ultimate Fighter, was not even supposed to experience.