Robbie and her new husband Abe O'Neill are enjoying a summer evening in the park with fellow townsfolk excited for some Friday night fireworks. In attendance are senior residents from Jupiter Springs Assisted Living including Roy Bird... Roy is a member of his group home's knitting circle... But when the lightshow ends, one of the knitters who sat with Roy is found dead, a puncture wound in her neck... To help find the killer, Robbie's going to have to untangle the knotty relationships deep in the victim's past.