When unidentified parasites violently take over human hosts and gain power, humanity must rise to combat the growing threat in Netflix horror series “Parasyte: The Grey.”

From Train to Busan and Hellbound director Yeon Sang-ho, the Korean sci-fi horror series is based on the legendary Japanese manga Parasyte (Kiseijuu) by Hitsoshi Iwaaki.

It’s coming to Netflix on April 5. Watch the INSANE official teaser trailer below!

Here’s the official synopsis from Netflix: “They arrive in silence and darkness. They descend from the skies. They have a hunger for human flesh. They are everywhere.

“They are parasites, alien creatures who must invade-and take control of-a human host to survive. And once they have infected their victims, they can assume any deadly form they choose: monsters with giant teeth, winged demons, creatures with blades for hands. But most have chosen to conceal their lethal purpose behind ordinary human faces. So no one knows their secret-except an ordinary high school student. Shin is battling for control of his own body against an alien parasite, but can he find a way to warn humanity of the horrors to come?”

Netflix previews, “Parasyte: The Grey draws inspiration from the legendary manga “Parasyte” by Hitoshi Iwaaki, which sold over 25 million copies in more than 30 regions and countries. Set in a new locale with fresh characters, the series charts its own unique course while maintaining the imaginative world and profound message of the beloved manga.

“At the center of the story is Su-in, portrayed by Jeon So-nee, as she grapples with her newfound coexistence with a parasite. The series also tracks the efforts of “Team Grey,” a group dedicated to fighting mysterious parasites that live off humans.”

Iwaaki said in a statement, “I am most excited that this is ‘a new story’; while I am the author of the original manga, I could also be a member of the audience that experiences thrill and awe. Thinking back to when the original manga was adapted in Japan, Parasyte the manga is like a ‘child’ to me, born from my own work in a small room, while the animation and live action film were like ‘grandchildren’, born from my child going out in the world and meeting many people and their wisdom, experience, and technology. I am overjoyed that another ‘grandchild’ is being born in Korea. I believe that this ‘new story’ taking place in a different location will lead us into a world beyond my imagination.”

Director Yeon says, “In my twenties, Parasyte was a staple for those of us who were passionate about manga and animation. Having the opportunity to build upon it and create something new is not only a great honor, but also a dream come true from my younger years.”

The cast for the “Parasyte: The Grey” series from Netflix also includes Koo Kyo-hwan as Kang-woo, a man driven to fight parasites in his quest to find his missing sister. Lee Jung-hyun portrays Jun-kyung, the determined leader of the anti-parasite task force, “Team Grey.” Kwon Hae-hyo plays Chul-min, a senior detective committed to protecting Su-in, while Kim In-kwon steps into the role of Won-seok, Chul-min’s junior colleague.