A female assassin is sent to murder a king by infiltrating a ceremony being held. At 22:11, the assassin sees a group of priestesses practicing a ritual dance for the ceremony, and we see her watch them intently and then begin mimicking their moves. At 24:47, the female shamans begin their dance, and we see the assassin dressed in one of their veiled costumes. Then, at 26 minutes, a warrior charged with protecting the king enters a large storage shed and hears "mmphs" coming from somewhere, and eventually the real priestess/shaman is found bound and gagged in her undergarments.
https://www.viki.com/videos/1182166v?locale=es