Each of the four Gospels takes account of Jesus' arrest in the Garden of Gethsemane. A large crowd of soldiers and Jewish officials had come with clubs and swords and torches to arrest Him, led by Judas Iscariot the betrayer. Jesus had just finished praying in great trepidation asking His Father to spare Him the agony which was to follow. Yet, Jesus assures His Father, it's not about what He wants, but what His Father wants.
Jesus takes charge and asks the crowd who they are after. When they say Jesus of Nazareth, Jesus informs them that He is the One they seek. Those words Jesus spoke knock the mob back and to the ground. When they get up and dust themselves off, Jesus asks them again who they are seeking, and again they say Jesus of Nazareth. Jesus identifies Himself again and requests that they let His disciples go, thinking more of others than Himself.
Then Peter, the impetuous one, draws his sword and begins to defend his Lord, slicing off the right ear of, possibly the closest antagonist, Malchus, the servant of the high priest. Jesus immediately heals Malchus' wound and commands Peter to put away his sword saying if He wanted, He could have prayed, and His Father would have sent more than 12 legions of angels to rescue Him. But, Jesus, instead, is obedient to what He and the Father have agreed on from eternity past, telling Peter this is the way it must happen so that Old Testament scripture, written some 700 years before, be fulfilled.
Jesus laid down His life not only to fulfill Scripture concerning His death, but, more importantly, to provide a way of escape for us. Jesus allowed physical death to overtake Him so that we could escape eternal death. Jesus refused escape so we could escape. We, as sinners, deserve death. Jesus, as the perfect sinless sacrifice, paid our sin-debt for us. The only way to be seen as righteous in God's eyes and be qualified for heaven is to believe Jesus died for us on the cross and live for Him each day. There is no Plan B.