When villainous Gru hatches a dark and evil plan to steal the moon from the sky, he finds himself caring for three young orphan girls instead. Seeing an opportunity in these unexpected visitors, Gru hatches a plan to use the girls to help him steal the moon and enact his sinister schemes. As he spends more time with them, Gru starts to realize that these girls have a unique ability to make him feel cared about and valued, and even considers letting them go. However, when his former boss learns of Gru's newfound softness and his unconventional family, he threatens their safety.