The mother of all demons is on a mission in a chilling new teaser for Season 3 of Shadowhunters.

Lilith (Anna Hopkins) is determined to resurrect Jonathan and, judging by the firm resolve of her voice, it's probably not a good idea to get in her way. "No one will stop me from bringing my boy back," she declares in the video.

The new season will see the shadowhunters take on a new evil — most likely made up of Jonathan and Lilith — while dealing with their own personal problems. For Magnus (Harry Shum Jr.) and Alec (Matthew Daddario), they'll try to overcome their relationship woes in the wake of Valentine's (Alan Van Sprang) death. On a more positive note, it looks like we'll be treated to some steamy scenes between Clary (Katherine McNamara) and Jace (Dominic Sherwood) which may or may not be real.

Shadowhunters: Here's Your First Look at Malec in Season 3!

Watch the drama and magic unfold when Season 3 of Shadowhunters premieres Tuesday, March 20 at 8/7c on Freeform.

Anna Hopkins, ShadowhuntersAnna Hopkins, Shadowhunters