Promise Me

So far in the book An old women that sees a girl that has been kidnapped and follows her in the city and then sees her on the subway, after that the next chapter is with Myron and the stuff what i wrote above. In the next chapter Myron (main character) makes his friends daughter and her friend promise him that they will call him whenever they have been drinking or in trouble and they don't know how to get home. The next chapter is about Myron's past.