Lindsey Farris is a young agent in the IMF who has been captured by Davian.   This scene is part of the extraction of Lindsey from where she was being held.   She is complaining about something that obviously is hurting her. Davian has injected an explosive device in her skull. This comes back into play toward the end of the movie when Davian does something similar to Ethan.   Just before this clip, Lindsey tries to warn Ethan about something.   We don’t find out what that was until a microdot she mailed him is evaluated later in the film.

This scene brings the extraction team together; Luther (Ving Rhames), Declan (Johnathan Rhys Meyers), and Zhen (Maggie Q) are all part of the extraction team.

It is yet another failed initial mission for Ethan in the series.   In Mission: Impossible (I), the mission to grab the NOC list from Golitsyn goes bad with agents dying.