In High Strung, Galitzine plays Johnnie, a young British violist busking in the New York City subways to make ends meet, and with the hopes of somehow making it as a musician. Eventually he meets Ruby (Kampa), a classical ballerina, who is his opposite in myriad ways. Despite their differences, they’re drawn to one another, and Ruby ends up helping to devise a plan to get Johnnie into an elite conservatory.