1) Emma and James were in a relationship but Emma chose to move to America for her career, hurting James in the process.
2) Years later, Emma has regrets about leaving James and is shown at different times missing him and thinking about their relationship.
3) James struggles after the breakup, drinking heavily and trying to move on.
4) The documentary flashes between Emma and James' lives after the split, implying they still have feelings for each other, and leaves their relationship status ambiguous at the end.