4Numbers rule Dr. Mei Sharpe's life. She has no husband, one friend, two daughters, and three random meetings with the same woman within four weeks. Once is chance, twice is coincidence, but upon the third meeting, even Mei in all her empirical rigidness must admit that perhaps the universe is giving her a nudge. A nudge that lands her directly in the path of Lieutenant Morgan Kelly--an affable, charming detective for the Sheriff Department's brand-new cold case team working down the hall from Mei's morgue.

More golden retriever than hard-boiled detective, Morgan is determined to pull the asocial widow out of her shell. As the icy scientist warms to her cheerful new friend, an irrepressible chemistry develops, and Mei begins to realize she's perhaps a different number on the Kinsey scale than previously considered.

As Mei and Morgan struggle with guilt and grief, drama and desires, Mei finds her scientific austerity is no match for the universe and its nudges toward the startling revelation of what her heart really wants.