Some secrets are deadlier than love.

Mystiobiologist Alexandra Dalton knows two things for certain: rare luminal fungi are fascinating, and her life is anything but ordinary.

When a bizarre mouse-scorpion hybrid turns up in an ancient cavern and stings her mysteriously glowing cat, Ivy, Alex is pulled into an investigation that's equal parts scientific puzzle and family secret. Forced to team up with her estranged husband Rick—a dashing treasure hunter with more charm than caution—she must unravel a deadly mystery involving a toxic flower that's claimed more than just plant victims.

Between deciphering luminal clues, dodging potential poisoners, and managing her cat's inexplicable luminescent tendencies, Alex is about to discover that some scientific mysteries are better left unexplored. But when a generations-old murder demands justice, she'll risk everything to bring the truth to light—even if it means working alongside the one person she swore never to trust again.