Hi there,
Thanks for emailing support!
The easiest solution to what you are looking to do is to use the Excerpt meta box in your Events posts.
If that box is not displaying on your page, you can get it to appear using the screen options at the top right of the Edit Event screen.
Basically, the plugin will look for any content in that box. If it can’t find any, it will then resort to displaying the content from the post itself up to 80 characters.
Finally, you can totally make things automatic by changing the excerpt’s length in the functions.php file of your theme however it sounds like you may not be able to do this second option.
Thanks,
Brendan