Eternally is about a boy from the 1600’s who discovers a cup that gives him immortality. In each chapter you will read about a certain member’s own experience on becoming immortal and soon you will be brought to present day as the story goes more into the actual plot. 

The overall plot: In order to live forever, the boys need to drink from the cup every hundred years on a blood moon. Since there wasn’t any during the 17th-20th centuries, the boys are very worried. However, someone has stolen the cup while one young man finds his true love revealing to her that he is immortal causing her to want the same.