In 2 Corinthians 5:20, Paul tells the believers in Corinth that they are ambassadors of Christ. That they are to conduct themselves in a manner worthy of the gospel and people through whom God makes the appeal to be reconciled to Himself.
The Embassy is a group that happens during our Morning Service where young people from P7 upwards get together to study the Bible and discuss life together. They will either be following the same theme as the adults are hearing about in the All Age Service or discussing how the gospel applies to different areas of life. Normally The Embassy leaves the service just before the sermon.
On some weeks The Embassy do 'appchat', where they listen to the sermon, note down key points and discuss it at the end.