The Horizon Lunar Colony was a space colony intended to serve as a launching point for humanity's next step in space exploration. In an effort to study the effects of long-term living in space, the station housed a number of genetically enhanced gorillas. Winston was one of these gorillas. The whole colony was funded and managed by Lucheng Interstellar.
The other gorillas banded together and rose up against the scientists, killing them and taking the facility for themselves. Included in the death toll was Winston's caretaker, Dr. Harold Winston. Winston himself built a rocket and escaped the colony to Earth.