M. Night Shyamalan’s Split (read our review) looks like the best thing since sliced bread, which is even in the trailer.

It’s Psycho meets Identity meets 10 Cloverfield Lane in the chilling second trailer for Split, which stars James McAvoy (X-Men) as a psychopath harboring 23 identities.

In the film, opening in theaters January 20, 2017, The Witch‘s Anya Taylor-Joy is kidnapped (along with two of her friends) by McAvoy. Here’s the kicker… there may or may not be a monster. If there is, it might just be McAvoy who physically transforms into one; it’s like a new kind of werewolf movie with a taste of “Jekyll and Mr. Hyde”!

Betty Buckley, Jessica Sula and Haley Lu Richardson also star in Split, which Trace Thurman reviewed after its secret screening at this past September’s Fantastic Fest in Austin, Texas. He explains that, “Like many of [Shyamalan’s) films, it will no doubt split (sorry) audiences, but McAvoy’s performance alone earns the film a full recommendation. He is a marvel to behold.”

Here’s the full plot crunch:

While the mental divisions of those with dissociative identity disorder have long fascinated and eluded science, it is believed that some can also manifest unique physical attributes for each personality, a cognitive and physiological prism within a single being.

Though Kevin (James McAvoy) has evidenced 23 personalities to his trusted psychiatrist, Dr. Fletcher (Betty Buckley), there remains one still submerged who is set to materialize and dominate all the others. Compelled to abduct three teenage girls led by the willful, observant Casey (Anya Taylor-Joy, The Witch), Kevin reaches a war for survival among all of those contained within him—as well as everyone around him—as the walls between his compartments shatter apart.

Split brings back part of the team from The Visit, which includes producer Marc Bienstock, Jason Blum, and executive producers Ashwin Rajan and Steven Schneider (Insidious, Blair Witch).