20-year-old Katarina (Alicia Vikander) finds solace in Mozart's music despite the difficult circumstances she lives in.

Despite having little in common, Mattias accompanies Katarina to a classical concert to fulfil her love for Mozart.

However, after a fight with some students, Katarina loses her job at the school and finds herself wandering aimlessly.

By chance, she ends up at the municipal concert hall, where she is mistaken for a job seeker and invents a dramatic story about her mother.

Despite Katarina's lie being exposed, Adam remains interested in her due to the mystery surrounding her as the orphan of a concert pianist.