You can live or die it's up to you.
You are on a gigantic planet. On this planet there is no land, the entire surface is blanketed by a deep fresh water ocean. However there are gigantic turtles which swim through the ocean, there are some that can swim fast enough so that they circle the globe in what to you and I would seem like 24 hours. Some like the sun and swim to never leave it's light and some like the night where it's dark and cold.
ANYWAYS, on the back of these big sea turtles you'll often find life, plants, mammals, gods and death. Death is a key character in this story. On the day someone is destined to die, Death will visit you and offer you some parting words before coming to take your later in the day. Sometimes Death tell the dead something they've always needed to hear, sometimes it's a message from a dead loved one who's passed into the next world.
But sometimes when Death feels merciful, he'll hand you a riddle, and if you solve it you can continue to live till he arrive again.
Your character is named You because it makes my job easier, I hope you enjoy.