Joining Tables - Return Name / Description And Keyword For Every Record ID

I have 3 tables I'm trying to join:

Table 1: Contains ID, Name, Description
Table 2: Contains ID, Keyword
Table 3: Is lookup table for tables 1 & 2

I need a query to return a table having columns of:
Name, Description, Keyword for every record ID in Table 1

The issue is that table 2 contains multiple keywords for each key ID and my query returns an error: Subquery returned more than 1 value.

When I run this query using a specific key, it returns the correct information the way I want it:

DECLARE @ServiceID VARCHAR(10)
SET @ServiceID = '35'
DECLARE @Name VARCHAR(8000) DECLARE @Desc VARCHAR(8000) DECLARE @Keywords VARCHAR(8000)
SELECT @Name = [DefService].[Name],@Desc = [DefService].[Description],@Keywords = COALESCE(@Keywords + ', ', '') + [DefKeyword].[Name] FROM [DefService] INNER JOIN [DefKeywordServices] ON [DefService].serviceid = [DefKeywordServices].[ServiceID] INNER JOIN [DefKeyword] ON [DefKeyword].[KeywordID] = [DefKeywordServices].[KeywordID] WHERE [DefService].[ServiceID] = @ServiceID PRINT @Name + ' | ' + @Desc + ' | ' + @Keywords
SELECT @Name AS Name,@Desc AS Description,@Keywords AS Keywords

Results:
NameDescriptionKeywords
GoToMyPC - Account RequestRequest a Citrix GoToMyPC account.GTMPC, GoTo, application, software, install, Installation, applications

When I run the same query without a specific key it fails. The results only return a single row containing Name, Description and then ALL keywords for every key ID...very odd behavior.

BTW, I need to do this in a single SQL query and not a stored proc or other method.