Tonya Wellington, the soon-to-be-ex-wife of Bill, is a former client of Stacey Collins' matchmaking agency. When Stacey's death is discovered in the early stages of "Nikki Heat", her entire client list comes in for scrutiny from Beckett and the team. Having worked their way through those who attended the "thank you" party, Castle and company find a couple of names who turned down the invitation, Bill and Tonya. She was of particular interest, having left a $6,000 bag with $250,000 in it inside a jukebox in Stacey's office, and arrives for her interview with a phalanx of legal representation.