There are a number of potential solutions to your request depending on the exact environment you are using or have access to.
Are you hosting your story HTML file on a web-server with a mail-server installed or have access to a mail-server?
** This is an example not a recommendation, as I have never used that particular service provider myself.
If you don't want to use a service like the above then your third option is to use the mailto: protocol, which is flaky at the best of times because it relies on the end-user's email client & operating system being setup correctly to handle those requests.
warning: I may of missed some options as it's been a while since I needed to write code to send emails this way, and memory isn't what it used to be.