The Essanuesco Files

Humanoid aliens show up to compete at a near-future Olympics, held once again in Los Angeles. Every power on Earth is clawing at each other to obtain their technology. Apparently undefended, they are in fact a marginal group of dissidents their own authorities consider expendable. Two athletes from Vancouver each form a relationship with one of them, and when they uncover a plot to intern them and subject them to interrogation for their space-faring technology, risk their lives to warn them. However, they have seen too much of it in operation and are abducted and expected to assimilate into the alien society.