Red Means Stop.In order to destroy the Blue Morpho, the Guild joins forces with the OSI to conduct a sting operation using Dr. Venture's next arching, by supernatural assassin Red Death, as bait. Fearing Red Death, who is known for killing every time he arches, 21 tries to discourage the Monarch from targeting him. The Monarch ignores 21's concerns and tries to kill Red Death in a park, only to be charmed by the supervillain, who recognizes him as the Monarch. While Venture, Billy and Pete hide with Colonel Gentleman, Action Man and Rose, Hank and Dean go with Shore Leave for a night on the town. With the Venture family impersonated by members of the Guild and OSI, Red Death arrives on his flying horse and engages Brock in combat. When the Blue Morpho does not show, both sides decide to have a party instead. Red Death receives a call from the Blue Morpho — who is using a voice changer — threatening him to sign away his arching rights on Venture in exchange for the safety of his wife and daughter. Red Death becomes furious and invades the Morpho Cave, where he discovers the Blue Morpho is the Monarch and learns the threat was a bluff. Reverting to his gentle persona, Red Death advises the Monarch that rules give villains the ability to do what they love, urging him to finish his work and come to a conclusion about who he really is. As she leaves the Venture building, Dr. Mrs. the Monarch expresses anger at the Blue Morpho standing her up and swears she will find him and kill him herself. It is also revealed that 21 was not killing any of the villains arching Dr. Venture, as previously believed, but instead locking them in a secret bathroom in the Morpho Cave, where one had gone mad and killed the others.