ISMS Policy and Objectives

There are a list of mandatory documents that you need to implement the ISO 27001, and it contains "Information security policy and objectives" that I think is very similar to the document that you need. For more information about the Information Security Policy, please read this article "Information security policy - how detailed should it be?" : https://advisera.com/27001academy/blog/2010/05/26/information-security-policy-how-detailed-should-it-be/
This article can also interesting for you "ISO 27001 control objectives - Why are they important?" : https://advisera.com/27001academy/blog/2012/04/10/iso-27001-control-objectives-why-are-they-important/
Finally, here you can find a list of mandatory documents (and non mandatory) "List of mandatory documents required by ISO 27001 (2013 revision)": https://advisera.com/27001academy/knowledgebase/list-of-mandatory-documents-required-by-iso-27001-2013-revision/