Hart is a soldier stationed with NEST. She is just like any other soldier, or so everyone thinks. Sideswipe confides in her about his twin, one bots seem to forget he has. But then, Sunstreaker lands on Earth. Hart is the first person he meets, but she does everything to avoid him. A mystery begins to unfold for the Autobots. While Sunstreaker is slowly learning things about Hart, they come to realize she may have the answer to the mystery. Becoming the only one that can save them. But it will come at a cost. She has already lost something very important to her. Sunstreaker and Sideswipe have already become attached. But to gain the win and save everyone, they may have to let her go, too. This story is based during Bayverse. No particular movie. There is mild language and violence.