Can someone summarize the book the scythe by neal shutusterman?

Two teens must learn the “art of killing” in the first book in a chilling new series from Neal Shusterman, author of the New York Times best selling Unwind dystology.

In a world where disease has been eliminated, the only way to die is to be randomly killed (“gleaned”) by professional reapers (“scythes”). Citra and Rowan are teenagers who have been selected to be scythe’s apprentices, and despite wanting nothing to do with the vocation, they must learn every method of ending life and come to understand the necessity of what they do.

Only one of them will be chosen as a scythe’s apprentice. And when it becomes clear that the winning apprentice’s first task will be to glean the loser, Citra and Rowan are pitted against each other in a fight for their lives.

Hope this helps.