LuLu and Boo are two very happy house cats. They have all the love, food, and attention any cat could want — not to mention their choice of sunny spots! There is no need to leave the comfort of their home. Besides, it looks way too scary out there! One day, something unusual happens. A strange face appears at the window. These two complacent cats become two very curious cats and, with so many questions bouncing between their ears, they decide to take their first steps outside.