Have you ever been in a conversation in which it seemed that you and another person were not talking about the same thing even though you were arguing about it strenuously? Something like that is going on in Mark. Jesus and the Pharisees are in conflict with one another but not necessarily about the same things and certainly not on the same terms.
While Jesus is teaching and healing around the lake region in Galilee, some Pharisees and scribes from Jerusalem come north to investigate the popular rabbi-healer. This seems to be the first conflict with religious leaders from Jerusalem, but it is not the first time that Jesus has been criticized for violations of religious rules.