How can I connect Ember.JS with a database?

I'd like to connect Ember.JS to a persistent datasource.

Ember.JS could manage the main parts of the application. Express.JS could assist to fetch data and save Ember.JS's app data in a database.

I've heard of stores, models and adapters... Honest, it confuses me a lot!

Could anyone explain the ways of connecting Ember to Express?

Thank you!