"Monsters Inside: The 24 Faces of Billy Milligan" is a documentary series created by the American streaming giant Netflix. The series is based on the sensational story of a legal case involving a man named Billy Milligan, who suffers from multiple personality disorder. Initially, Milligan was accused of numerous thefts and even rape. However, as the case unfolds, it becomes clear that Milligan himself is not responsible for the crimes committed, as they were carried out by his other personalities.