The playful and naive cat siblings from the countryside have never had the chance to experience the famous Vietnamese dish, bún bò. Alongside them is a penguin friend from a cold land, but one who's familiar with the heat. The one thing all three have in common? They've never tasted bún bò or any other Vietnamese specialties. Fate brings them together, and they all share the same goal: to travel to Hanoi. And thus, the epic story of bún bò begins.