On Bossun's 15th birthday, he finds out the truth about his parents. Unable to cope with the tragedy, he lashes out, only to meet the child his father once saved when he was a kid, all grown up, who gives him a letter...
Leaving his only son 
behind, just like that...
Dejando a su único
 hijo atrás, sin más...
Deixando seu único filho
 para trás assim...