Starts after 3x14. Just as Casey takes Severide's advice and begins to try to move on, an accident leaves Gabby fighting for her life, forcing Matt to make a decision about what he really wants, but is it too late? Does Gabby even want to return to the life she's been living? How will her loved ones cope?

Meredith and Derek experience a horrible accident, changing their lives forever. They haven't moved. Life flew by and there they stand. Now they just need to find each other, but how can they after what happened....