This one was inspired by watching Disney's Sleeping Beauty and re-reading the original Grimm version.
Say that Jazz (or which ever Autobot you want) has a Decepticon who is obsessed with him. This Decepticon, let's call him Obsessed for this bunny, will do anything to make Jazz his, but unfortunately Jazz is already bonded to Prowl (or, again, whichever other Autobot you decide). Obsessed is also specialized in hacking and implating viruses into other bots. He somehow learns about the human fairytale, Sleeping Beauty, and decides to create a virus based on the story. The virus will make who ever it infects fall into a death-like stasis (in other words, to all appearances and medical scans, the infected has died, but is really in a very deep stasis). Once the Autobots are convinced that Jazz is dead, they would then bury their friend, and he would go and retrieve him and finally get the object of his obession without any fear of pursuit from his comrades. There's just one thing the Decepticon may or may not have counted on; his fixation's bondmate would know whether or not his bonded is truly dead, so Obsessed has to offline, or at least put into stasis at the same time, Prowl before the Autobots could determine whether or not Jazz is really deceased. Once he has retrived Jazz, he can then hack into Jazz and reprogram him to believe that he, Obsessed, is and has always been his bonded.
How this could end is up to you. Prowl could have been repaired in time to stop Obsessed from carrying away Jazz's chassis, and then beat the cure out of Obsessed, which, since it's based on the original Grimm Fairytale, is something rather sexual in nature.
You can let your imagination supply the rest. ;)
Please tell me what you think of this one?