Clockwork City opens its gates once every century for a grand competition. Hundreds of engineers are eager to gain the championship, but nobody knows that the floating city captures the most talented ones to take care of its sensitive clockwork. You are one of the winners who want to escape from lifelong slavery. Your only chance is to build a flying machine and a code breaker from the pieces you find in the city’s scrapyards and get enough fuel for the journey. Which one of you will succeed first?