Twisted Tea Christmas by Laura Childs

Tea maven Theodosia Browning and her tea sommelier, Drayton Conneley, are catering a Victorian Christmas party at a swanky mansion in downtown Charleston. Drucilla Heyward, the hostess, is one of the wealthiest women in town.

As the champagne flows and the tea steeps, Drucilla is so pleased with the reception by her partygoers that she reveals her secret plan to Theodosia. The Grande Dame has brought the cream of Charleston society together to reveal that she is planning to give her wealth away to various charitable organizations. However, before she can make the announcement, Theodosia finds her crumpled unconscious in the hallway. It looks like the excitement has gotten to the elderly woman–except that there is a syringe sticking out of her neck.