If I Could Do It Again

Dan and Phil have been married for ten years now. It's not a big deal, or so Dan thinks. After a romantic outing, Phil finds an article about a group of scientists who need human test subjects to test their time traveling machine. Phil volunteers and decides to bring his camera along to make a documentary of his and Dan's entire relationship, starting from day one. The machine isn't perfect, and gives Phil side effects that weren't expected for the test subjects. What could go wrong on Phil's adventure to get the perfect anniversary gift?