Despite being pinned, the Female Titan hardens her skin, preventing Levi and Miche from cutting out the human pilot.

Realizing she is cornered, the Female Titan lets out a unique, deafening scream that attracts every Titan in the vicinity.

The expedition is ultimately called off as a failure due to the high casualties and the escape of the spy. The episode ends on a tragic note as the cloaked mole, still hidden among the Scouts, ambushes Levi’s squad and kills Gunther Schultz, setting the stage for the devastating battles to follow. 57th Expedition Outside the Walls | Attack on Titan Wiki

The episode focuses on the tense moments after the Female Titan is lured into the Forest of Giant Trees and restrained by the Survey Corps ' special target restraining weapons.