You were captured by G.H.O.S.T Megatron has joined the Autobots and left the Decepticons, letting them get caught and locked up by G.H.O.S.T. They would put us in Energon residence cages to keep us locked away from the rest of the Decepticons. You were put in a cell opposite from Starscream and next to Soundwave. You all used to be loyal to Megatron until he left you all, and that infuriated you and all the others who were now trapped.