It is now night. Mark says "That evening after sunset …," one of his examples of redundancy as evening and after sunset are really the same thing repeated. Neither Luke and Matthew retain this redundancy. By this time word has spread and the people have brought the sick and possessed for Jesus to heal, which he does. Mark says the "whole city" came to see Jesus, which is probably an exaggeration. Both Luke and Matthew just state there were many people. The demons leaving the possessed people are not allowed to tell people who Jesus is, a common theme of Mark called the Messianic Secret. Jesus is able to cure every affliction of the people who come to see him.