Remember that Matthew really points out Jesus' Jewishness. It is almost Passover, a big festival remembering Israel 's deliverance at the Red Sea . Jesus will be the Passover "lamb" for the New Covenant God has. The religious leaders want to kill Jesus. He is too much a threat to their system.
Jesus prepares for the Passover meal with his friends. It will be his last supper with them. Judas will work with the religious leaders to trap Jesus. Even Peter will deny Jesus. Jesus goes to pray but even his closest friends fall asleep and don't realize what Jesus is going through and will go through. Jesus is arrested and taken to a religious tribunal. He is questions and the group believes he blasphemed by say he was God. That deserves death by their religious standards. Peter saves his own life by disowning Jesus.