Watch Heartthrob (2017) HD Full Movie Free on solarmovie.do. Watch Heartthrob (2017) online free. Shy Henry is overjoyed to fall into an unexpected romance with gorgeous and popular Samantha the sum...Shy Henry is overjoyed to fall into an unexpected romance with gorgeous and popular Samantha the summer after high school graduation. When Henry's love spirals into twisted obsession, Samantha pulls back.