Best friends and amateur sleuths Alvirah Meehan and Regan Reilly join forces on a luxurious three-day cruise around San Juan Island to solve a real-life murder mystery, as they set sail from a whodunnit theme game created by Nora Reilly's latest book release. With the ship's calm waters hiding dark secrets, this dynamic duo must work together to unravel the tangled web of clues and uncover the truth behind the murders on board. As the stakes rise, Alvirah's intuition proves crucial in solving the case, but can she outsmart the killer before it's too late?