 On board the Forerunner ship , the Master Chief is captured and interrogated by Covenant forces , but manages to escape using a concealed weapon . On Earth , Ruwan and Tyla escape detection by the Covenant and appropriate a vehicle in an effort to escape . Ruwan reveals that the Key is in fact a fictional object that he and his brother James Ackerson made up as children ; James told the Covenant about the Key in order to prevent the outright destruction of Cleveland . After fighting Covenant forces , Ruwan and Tyla are rescued by marines and leave the city . The Master Chief attempts to kill the Covenant 's leader , Prophet of Truth , but is discovered as he takes aim ; Truth escapes as the Chief is left to kill the Prophet 's guards and find a way off the ship . Learning that there is no way to change the Forerunner ship 's destination , the Chief jumps to Earth using a piece of the vessel as a heat shield . 
 On board the Forerunner ship , the Master Chief is captured and interrogated by Covenant forces , but <a href='uninflect' title='1'><mark>manages</mark></a> to escape using a concealed weapon . On Earth , Ruwan and Tyla escape detection by the Covenant and appropriate a vehicle in an effort to escape . Ruwan <a href='uninflect' title='2'><mark>reveals</mark></a> that the Key is in fact a fictional object <a href='null_relcl' title='3'><mark>that</mark></a>he and his brother James Ackerson made up as children ; James told the Covenant about the Key in order to prevent the outright destruction of Cleveland . After fighting Covenant forces , Ruwan and Tyla are rescued by marines and leave the city . The Master Chief <a href='uninflect' title='4'><mark>attempts</mark></a> to kill the Covenant <a href='null_genetive' title='5'><mark>'s</mark></a>leader , Prophet of Truth , but is discovered as he <a href='uninflect' title='6'><mark>takes</mark></a> aim ; Truth escapes as the Chief is left to kill the Prophet <a href='null_genetive' title='7'><mark>'s</mark></a>guards and find a way off the ship . Learning that <a href='dey_it' title='8'><mark>there</mark></a> is no way to change the Forerunner ship <a href='null_genetive' title='9'><mark>'s</mark></a>destination , the Chief <a href='uninflect' title='10'><mark>jumps</mark></a> to Earth using a piece of the vessel as a heat shield . 
On board da Forerunner ship , tdaMaster Chief is captured and interrogated by Covenant forces , but manage to escape usin a concealed weapon . On Earth , Ruwan and Tyla escape detection by the Covenant and appropriate a vehicle in an effort to escape . Ruwan reveal dat the Key is in fact a fictional object he and his brother James Ackerson made up as children ; James told the Covenant about the Key in order to prevent the outright destruction of Cleveland . After fighting Covenant forces , Ruwan and Tyla r rescued by marines and leave thdaity . The Master Chief attempt to kill the Covenant  leader , Prophet of Truth , but is discovered as he take aim ; Truth escapes as the Chief is left to kill thedaophet  guards and find a way off the ship . Learning tdatit ain't no way to change the Forerunner ship  destination , the Chief jump to Earth uusina piece of the vessel as a heat shield .