Murders begin occurring the day Shamus McCloud arrives in town. At first the murder of Doctor Ingram's dog seems to be possible revenge by Shamus McCloud for the death of his brother at the doctor's hands. More murders take place and McCloud is blamed, the believed reason being he is taking revenge on the town too. The Rangers investigate other people who came to town the same day, such as Prof. Smythe and his traveling Museum of Horrors. One of the victims is a gambler that Joe owed money to so even he falls under suspicion. Shamus finally asks to be put in jail so he'll be cleared when the next murder happens. While he is playing cards with Chad and Joe in the jail the three of them figure out the killer is someone who can't tolerate high-pitched noise.