Fresh with comedic interludes, Mazel Tov brings together four argumentative siblings who see their relationship with different eyes. Dario Roitman, the second oldest in his 40s, left Argentina for the U.S. years ago and now returns home for his sister’s wedding and for the opportunity to rebuild family ties. His entire plan goes up in smoke when he receives the news that his father has died and his older brother is still angry with him.