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.

For Split, Shyamalan and Blum reassemble their core team from The Visit.  Their fellow collaborators include producer Marc Bienstock and executive producers Ashwin Rajan and Steven Schneider.