Experiment Predcon Optimus Au! ^_^

Optimus was captured by the Decepticons and experimented on, now he's a predcon, he doesn't have any memories, but remembers a beep/voice calling out for him, before Optimus was actually captured, Optimus is trying to find out about the beep/voice, because that beep/voice sounds so familiar, and Optimus can't put his finger on it.