McFly follows Cassandra, a young girl fly, and McFly, a young boy fly, along with their brothers and sisters, as they journey to different parts of the world. Cassandra, a city fly, experiences country life, while McFly, a country fly, experiences city life. And throughout their travels, they connect with each other.
As the young flies embark on the journey of their lives, they have many adventures along the way learning important lessons about growing up. McFly communicates the message that it doesn't matter where you live, it's the dreams in your heart that really matter.