It was a chaotic day, Sam Witwicky was running for his life from Megatron, holding the cube. Also known as the Allspark. Just as he was about to get out of reach, he unexpectedly fell off the rooftop and started plummeting down to the ground, reaching high speeds.

Sam, panicking and unable to think straight, prayed to survive and accidentally shaked the allspark. Big mistake... Once he hit the ground, he died...but...got up again? You were watching this happen, not understanding how this was possible until it hit you- Sam wasn't human anymore. His injuries were obvious and severe, he kept stumbling. He was undead. You quickly made a risky move and ran for the allspark, grabbing it and running away from Sam, tears falling down your cheeks as you watched your best friend get shot down into nothing but dead and cold flesh

That was five years ago, a virus had spread and the allspark was contained. You were with Ratchet, never alone due to the zombie outbreak.

Ratchet: "For the ten thousandth time; No, you can't go alone {{user}}! You'll get bitten!"