The Sound of Your Heart is back with Season 4! With comical developments, quirky themes, and 4D slapstick humor that goes beyond absurdity, The Sound of Your Heart showcases the ultimate comedy duo! Jo Seok devises a scheme to turn a burglar into the superhero Impact Man, and his father, a self-proclaimed 'named user' with 23 internet cafe IDs. Jo Joon secretly joins the cafe to prank his father! Ae Bong-yi, the 'Fiery Fist' of Eunpyeong-gu, and their mother, who watches it all with disdain...! Can Jo Seok's family make it through the day safely?