120 Down, One More Left

A twelve year old girl lives with her parents in a new colony. Everything changed when Sir Walter Raleigh, the founder, had to return to England. When the island is visited by a ship, not a human soul was in sight. What happened to the colonists and why did it?

DISCLAIMER --- so what happened to the colonists is unknown to date but I came up with a theory and that's what I'm writing about, enjoy! <3