Watch Pavlov's Dog Full Movie Free Online 123Movies. Two twenty-year-olds meet each other in the sanatorium and fall in love. Ksenia is an alchoholic, Maxim is suicidal. Gradually it becomes clear that the characters, betrayed by their relatives, kept inside the sanatorium, constrained by regimes and the cult of work therapy, are healthier and freer than many of those who live outside.