Based upon the music by legendary Swedish artist Tomas Ledin, "En del av mitt hjärta" is a musical drama about Isabella, a driven business woman and a real hot shot within the Stockholm finance world. When she returns to her small hometown to celebrate her father's 60th birthday she feels like a winner compared to her old classmates, being the only one who actually made something of herself. Isabella's confidence is shaken when she realizes that Simon, her big teenage crush, is marrying her childhood friend Molly and that she isn't even invited to the wedding. Isabella is used to getting what she wants, and seeing Simon so happy with somebody else bothers her. A part of her heart will always beat for Simon