Though Kevin has evidenced 23 personalities to his trusted psychiatrist, Dr. Fletcher, 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, 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 serves as a dramatic tour de force for James McAvoy in multiple roles -- and finds writer-director M. Night Shyamalan returning resoundingly to thrilling form.