Simplify the following text for a Grade 7 native English-speaking person.
Original: The pearl was found in a lagoon that belonged to an Indian who warned Ramon that the pearl belonged to the Manta Diablo .
Simplified: When Ramon learns of the tragedy , he realizes that the Indian was right and he decides to return the pearl to the Manta Diablo . Taking the pearl from the church , he sets out by boat for the lagoon .