Summer in Battle Lake kicks off with fireworks and festivities, but it’s a local treasure hunt that’s amping up the tourist trade. It certainly piques the interest of part-time reporter Mira James—both as fodder for a column because she could use the five grand in prize money. The treasure? A faux diamond hidden at the bottom of Whiskey Lake. When Mira takes a deep dive in search of it, rather than finding the planted jewel, she uncovers a legendary puzzle reaching back nearly seventy years. But fishing for answers puts her face-to-face with a suspicious new arrival: a creeper from her past up to his old menacing ways. When murder turns a hot June night into a scorcher, Mira realizes there are more mysteries hidden in this town than fake gems, and to solve them, she has to stay alive.