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.
A brutal home-jacking goes hopelessly wrong. Dave, one of the two robbers, manages to run off, leaving his brother Kenneth behind. Four years later, Kenneth is released from prison and much has changed. Dave has his life back on track and is trying to help Kenneth however possible, but is witnessing how the highly strung Kenneth tries to win back his ex-girlfriend Sylvie.
When Michelle, the CEO of a gaming software company, is attacked in her home by an unknown assailant, she refuses to let it alter her precisely ordered life. She manages crises involving family, all the while becoming engaged in a game of cat and mouse with her stalker.