She doesn't want to believe in love. He's always wanted to fall in love. She writes a diary to a dead female author. He doesn't want to hear about death. All Marc knows about Simone is what they say at school. What Simone knows about Marc is what no other boy has ever done for her. Since Simone's heart was broken her passion for drawing has been growing stronger, it's a an escape valve because she's never spoken to anyone about what happened. But Marc's arrival is her big opportunity to start to believe in people. All I Know About a Broken Heart is that in this world there are couples who meet, kiss, fall in love and break up. And if life is too sad to be happy?