Discovering that a serial killer is linking each of his crimes to a periodic table element, retired physicist and amateur sleuth Gloria Lamerino teams up with her homicide detective boyfriend to find the murderer

Gloria Lamerino is not eager for another murder investigation, but when the son of two dear friends falls under suspicion for murdering his girlfriend, she decides to use her sleuthing talents to track down the real killer

"Gloria and her best friends, Rose and Frank Galigani, are on vacation in the Big Apple. They plan to visit Matt's niece Lori Pizzano, a documentary filmmaker, and enjoy the holiday sights together: shopping on Fifth Avenue, dining in Little Italy, and honoring ancestors at Ellis Island, while Matt attends a conference with the NYPD. Unfortunately, Lori's documentary on ozone and environmental issues has deadly fallout. Gloria stumbles over the body...

When a physicist colleague dies of poisoning in his lab, Gloria Lamerino doesn't buy the police assessment of natural death. The fourth in a series of mysteries based on the 109 elements of the periodic table.