This heart-wrenching spot from DDB Argentina starts out like any endearing dog and owner tale: an elderly man goes everywhere with his loyal pup companion, who never leaves his side as he makes tea, runs errands and hangs out with his buddies at the coffee shop.
One day, however, the man experiences an attack that sends him to the emergency room. The dog follows him all the way to the hospital, standing guard outside through the night, through bad weather and into the next day and even the next. Finally, the doors open and they are reunited -- but not in a way you'd expect.
(Spoiler alert) The ad is for the Argentine Liver Transplant Foundation, which should give you a clue to how the story ends.