Transformers: Revenge of the Fallen
According to common wisdom, the plot of Transformers: Revenge of the Fallen is incomprehensible. Which is odd, as it actually seemed reasonably straightforward to me. Essentially it goes like this: Thousands of years ago - and apparently without anyone noticing - the Decepticons placed a device inside the Great Pyramid of Giza that can blow up the Sun and harvest it for energon, which they can use to fuel themselves and possibly restore their dying homeworld of Cybertron. The Fallen - the Decepticons' supreme commander, senior even to Megatron - wants to activate the device, but he fears setting foot on Earth due to the threat posed by Optimus Prime (apparently only 'a Prime' can kill him). Also, the device's starting key, the 'Matrix of Leadership', has been missing for millennia. The Autobots and their human allies end up getting involved in the Decepticon plan to find the key and start the machine and the whole matter is resolved in a string of unlikely plot...