Once upon a time, Nel and Gerard arranged to jointly end their lives whenever they had a sense of completion, as the ultimate symbol of their love bond.

From the Letterboxd web page: "Once upon a time, Nel and Gerard arranged to jointly end their lives whenever they had a sense of completion, as the ultimate symbol of their love bond. But when Gerard is ready and Nel is still in doubt, it puts pressure on their relationship. Suppressed conflicts and ingrained habits make it harder than expected to follow through with their intention".—Paul Gerard Kennedy