Communication doesn't always involve speaking. Disabilities don't make people any different from everybody else. Calum is mute, has been for mostly all his life. People will judge him but he won't mind, he knows he can't change who he is.
Maggie isn't exactly the quiet type. She argues over opinions and doesn't keep things in her mind. Whatever she says always comes from her mouth with proudness.
She's loud, he's quiet. Put them together and you make a quirky love story