Emma is a young conductor and rising star on the Montreal scene. Days of Happiness chronicles her complex relationship with her father and agent Patrick, who has maintained a devious hold on her since childhood. The possibility of an important position with a prestigious orchestra only raises the stakes for Emma. She will have to give way to her true emotions and make choices, both for her music and for herself, if she is to navigate her career and her romantic relationship with Naëlle, a newly separated cellist and mother of a young boy.