Malte Gårdinger as August Horn of Årnäs, a member of a noble family and second cousin of Wilhelm and Erik, third-year student, prefect and captain of the rowing team. Omar Rudberg as Simon Eriksson, a rising star in Hillerska's choir, a scholarship and non-boarding student; Sara's brother and Wilhelm's love interest. Frida Argento as Sara Eriksson, a scholarship non-boarding student and Simon's sister, who has social difficulty as a result of her Asperger's Syndrome and ADHD. The story centers around Prince Wilhelm. When he arrives at the prestigious boarding school Hillerska he finally gets an opportunity to explore his true self and find out what kind of life he really wants. Wilhelm starts dreaming of a future filled with freedom and unconditional love far away from the royal obligations - but when he unexpectedly becomes next in line for the throne his dilemma is heightened as he has to make a choice. Love or duty.