What happens when Ryle goes to Atlas's restaurant in Chapter 27?

Ryle barges into Atlas's restaurant. Atlas opens the back door and heads that way. Ryle comes at him and knocks Atlas off the steps. When Atlas tries to stand, Ryle punches him. Atlas does not retaliate. He stands. When Ryle starts to come at him again, Atlas backs up and Ryle trips. When he gets back on his feet, Atlas wonders if he is done. Ryle tells Atlas that he has no idea what he has been through. Atlas agrees. Then he tells Ryle that Lily is not going to go back to him because of the things he did to her. The three of them are going to have to work together because of Emerson.