Police say the young woman had applied for a job via Kijiji. A man and woman then met with her Friday at her home in the Finch Avenue West and Sentinel Road area.
It is alleged that the man began engaging the young woman "in a sexually inappropriate conversation," according to a police news release.
The young woman was sexually assaulted by the man.
The male suspect is described as a white, 45-to-50-year-old male. He is between 6'3" and 6'5" tall, has a skinny build, a greying beard and bad teeth.
The female suspect is described as a 25-year-old black woman, with a medium complexion and "a chubby build."
Police believe the suspects may have committed other sexual assaults.
Anyone with information about the identity of the suspects, is asked to contact investigators at 416-808-3100, or to call Crime Stoppers at 416-222-8477.