On the Scarlet Night

In 2099, 70 after World War 5, five young adults discover a piece of lost history that resurfaces, and only they can know about it. Every 20 years, a multitude of people must sacrifice their lives in order to keep the population at a decent pace, on the scarlet night. Out of the two options they have, will they make the right one, and will their relationship with one another burn and perish?