Henry is sick, Shawn tells Gus. He called to cancel their weekend camping trip in the mountains and Shawn couldn't be more thrilled, until he catches his dad driving through town, the picture of health. Now Shawn has to know why he was ditched, and he and Gus follow Henry to the Monarch Lodge, where they discover Henry is a member. After Shawn perfectly repeats the secret handshake, they enter the lodge to find Henry in a room full of robed lodge members, surrounding a dead body on the floor. The brothers have called Henry in for help, but he insists he's retired both from the force and the lodge and calls the police. Gus, meanwhile, realizes he's in a room full of doctors, and gingerly steps around the body to start networking. Shawn tells Henry that the deceased, Arthur Holmstrom, was murdered, possibly by poison, and no one in the room seems to be upset about his death. Henry's friend Ted Archibald, who called them in, is worried they did something wrong during Arthur's Patriarch ceremony. He had a ceremonial hood on for twenty minutes, and is worried Arthur might have suffocated. Lassiter and Juliet arrive at the scene. It turns out Lassiter has always wanted to be a member but has been blackballed by his soon to be former father-in-law, Irving Parker. Now Lassiter is determined to solve the case quickly to impress Irving and the rest of the lodge members. Meanwhile, Gus has been busy locking down an appointment with Dr. Downs, who has a large practice and is a big purchaser of pharmaceuticals.

It's four a.m. and an alarm is going off at the Santa Barbara History Museum. Lassiter and Juliet rush in to find that the mummy from the exhibit that opened yesterday is missing along with Hastings, the night watchman, who it turns out has a criminal record. That, combined with the fact that the mummy, along with everything else in the museum, is of so little monetary value that the board of directors keeps postponing the overhaul of the security system, leads Lassiter to conclude this case isn't worth his time. He's been in the papers lately because he's been trying to prove that the death of wealthy philanthropist William Wyles III was no accident, as was originally thought. He tells Juliet to put out an APB on Hastings' car and goes to leave but Sophie, the assistant curator, insists there's more going on. The alarm was triggered from the inside of the museum and although the security isn't top notch, nowhere on any of the footage does the culprit or the mummy appear. She thinks there's something potentially supernatural going on and she wants the paleosleuth who discovered Zippy the Dinosaur on the case. For once, Lassiter is happy to oblige. So Juliet calls Shawn, who is awake and in the middle taking pictures of a married man having an affair outside a cheesy motel. He finishes that and comes straight down to the museum where he sees fingerprints on the inside of the glass mummy case and footprints leading away from the exit door. There is something weird going on here, he tells them. The mummy got up and walked out.