When nightclub singer Deloris witnesses a murder, she seeks refuge in a convent. She becomes Sister Mary Clarence and turns the choir into a talented group, but her celebrity status endangers her true identity.

In Sister Act 2: Back in the Habit, a woman named Deloris Van Cartier is asked to return to her former convent school to help with teaching a rebellious group of students. The students are a mix of different backgrounds and talents, and Deloris must find a way to connect with them and inspire them to come together as a choir. Along the way, she faces challenges such as dealing with the strict Mother Superior and navigating the differences between the school and the urban neighborhood. With the help of music and teamwork, Deloris and the students come together to compete in a singing competition and prove that they are more than what society expects of them.