Little Lobo is eager to drive his new truck (camión) to the big celebration. He has all his party supplies and a band made up of frogs and a snake who rattles a maraca. He also has piñatas, cakes, fireworks, presents. In order to get to the celebration in the other country, they must cross a long bridge. 

As they set out on their grand adventure, they notice that a lot of other people are on the bridge traveling to the other side as well.  It starts getting later in the day and soon the day turns into night and Little Lobo starts to realize that they won't make the celebration on the other side in time.  He decides it's no time like the present to have a party!  And party they did with fireworks, music, food, and friends from both sides of the bridge.