In the comedy-drama Cas, Pepijn and Sjors' steady, seven-year relationship is shaken up after they allow a young student named Cas to sleep on their couch until he finds a place of his own. Gradually, both men fall head over heels for Cas' laconic charm and it forces them to reconsider their many long-term plans. Is Cas' presence endangering their relationship or is he actually a blessing in disguise?