Assassin's creed- A Whisper

Storm was extraordinary. She was silent but very deadly. No one saw her coming in till it was to late. Storm was both blessed and cursed with gifts. One of those gifts was time travel. She would have to go from one assassin to the next helping them out. She alway got the job done. Now when it seems they need her the most she is not there. She disappeared. Now she is only a whisper. A legend. Desmond needs her help and is sent back in time to find her. So how do you find an assassin that does not seem to exist? Only time will tell.