A grumpy old man's life is forever changed by his chance encounter with lovable children. It's a classic plot in many family films. Here the kids are three adorable girls selling cookies to support their orphanage. They encounter mean Gru, voiced by Steve Carell. He fancies himself a sophisticated arch villain in their cartoon world.
A young rival named Vector makes headlines by stealing the Great Pyramid using his shrink ray gun. Gru plans to steal the gun to shrink the moon and hold it hostage. (Like I said, it's a cartoon world.) But Vector's home is a real fortress. Gru spies on Vector and discovers he allows the girls into his home to buy their cookies.
Gru decides to adopt the girls and use them to gain access to the fortress. Funny action-filled scenes follow his attempts to steal the moon. The old curmudgeon is gruff and cold with the girls when they first move in. But as the girls win his heart, Gru is transformed by the affection that slowly develops. In the end, the girls change the old guy's heart with their sweet natures and charming antics. They just might capture the hearts of the audience as well.