Adventurers needed to investigate a traitor

Adventurers were sent to investigate someone who had attempted to steal a signet ring. They figured out that the church of the dragon of the center was associated with them, and went to investigate them. The church sent child soldiers out to test them, and when the party failed, the church gave up on them. The party then raided the church, making it 5 sub-basements down before finding opposition too strong.