The Summer I Turned Pretty's second season trailer, the headlines and initial reactions focused on how it featured “Back to December (Taylor’s Version),” a sneak peek of her upcoming Speak Now rerecording. But the bigger news—in my opinion—was how much the trailer reveals in regards to the plotline.While the series follows for the most part, there were some changes in season one of Prime Video series, the biggest being that Susannah decides to do the trial to treat her rapidly-advancing cancer.