Mario decides it's finally time to ask Peach on a date and, despite being warned by his brother that the last time didn't go very well, does just that. The date goes fairly well, ending with a kiss on the cheek and a jokingly stolen hat, but as Bowser watched jealously from above he formulates a plan to steal that meddling plumber away under the cover of darkness.
With just his hat and his brother to keep her strong, Peach has to set out to save Mario from the clutches of that evil turtle, and perhaps come to terms with her own feelings in the process. (BASED ON THE MOVIE)
When a forced wedding between Bowser and Peach is soon to take place, it's up to Mario the plumber - and his new friend Cappy - to crash it and save her again. Will he be able to save the princess in time? Or will the princess be stuck in another castle - forever?
This is a fan novelization. Parts of canon have been changed and altered a little, however, the main story is kept the same, and all "large events" play out the same way with some minor dialogue and character changes.
(Cover is official cover taken off Wikipedia.)