Hyleyn has now become involved with the immortal Sinkha, the most advanced life form in the universe. Through a series of dramatic circumstances, she is no longer wholly human — now she is also one of them... Together with her new Sinkha friends Aker and Darshine, Hyleyn embarks on an adventure to save a world from an encroaching invasion.

As an added bonus, Hyleyn includes an abridged version of Sinkha which contains fewer but enhanced (although static) CG artworks, as well as an expanded description of the original events.

[From Wikipedia]