Rewriting Mallory follows the lives of two people struggling to maintain control amidst the messy reality of an unpredictable life. Joshua, a young man dealing with grief after the passing of his sister, turns to writing as a means of processing his emotions. Mallory, a young woman who seems to always be one step behind, finds her life crumbling in front of her over the course one awful day. As their paths intersect, we are left to wonder: are we really the authors of our own stories?

Jake, a documentary filmmaker, must exploit his artist friend, Nick, in order to make an entertaining movie after his colleagues' critiques. Things get complicated when Nick sees how he's been portrayed.