The Monsters are throwing a party and have sent out invitations. One of their guests, Binary Bill has no idea how to get to their castle from his computer shop. Multiplex draws a free form map with just a curving line and emails it to him. This doesn’t work and Binary asks for landmarks. Multiplex quickly adds a few things that can be seen on route – but he doesn’t draw them in the right order. This leads to confusion and a further refining of the map. Ultimately the Monsters leave the castle and go on site to label all the streets in their neighborhood. Then Mina flies up above Monster Land to compare the map to the actual territory. A real world example of how firefighters use maps is included in the video.