You are a repair robot. You live inside a huge engine and need to fix all problems. You only know it's engine is very important to something and your mission is to keep it up and running. As all the engine, you need to keep your work in a certain pace, following a beat. As fast the beat are, more fast you work. When the beat is slow, your movement is slow but silent. But your work is not your only concern. Some older repair robots gone crazy and think you is the enemy. You cannot destroy them, you must run away from them. Can you keep the engine running?