All of the define status for the pages are in the database configuration table where they can be turned on/off in the Admin ...

You are using:
DEFINE_OUR_STORY_STATUS

if it is not defined in either the database or in, for example, our_story_filenames.php ... then it evaluates as 0 or false and is turned off ...

Page 3, for example, is added to the configuration table with this SQL command:
insert into configuration (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, last_modified, date_added, use_function, set_function) values ('Define Page 3', 'DEFINE_PAGE_3_STATUS', '1', 'Enable the Defined Page 3 Link/Text?<br />0= Link ON, Define Text OFF<br />1= Link ON, Define Text ON<br />2= Link OFF, Define Text ON<br />3= Link OFF, Define Text OFF', '25', '83', now(), now(), NULL, 'zen_cfg_select_option(array(\'0\', \'1\', \'2\', \'3\'),');