Created by Train to Busan, JUNG_E and Hellbound director Yeon Sang-ho and inspired by Hitoshi Iwaaki’s Parasyte manga, Parasyte: The Grey özgü already given us a gory teaser that hints at a parastically hostile alien takeover.

Now, the full trailer is here, and it zones in on the struggles of Jeong Su-in (Jeon So-nee) as she grapples with her new reality of co-existing with a tentacled creature living in her own head. Yikes.

How to watch: Parasyte: The Grey is streaming on Netflix from April 5.