The value is passed in the call to the sproc:

DECLARE @nKeyword_IdVarINTEGER = 120375

DECLARE @nErrorVarINTEGER = 0

BEGIN TRAN New_Tran

EXECUTE @nErrorVar = dbo.wadw_keywords

@cActionArg = 'D',

@nKeyword_IdArg = @nKeyword_IdVar OUTPUT

So it was evaluating to DELETE Keywords WHERE 120375 = 120375. Gah!!