The annual ceremony of the Vestal Virgins is about to be held. The compere hasn't turned up, so Ludicrus has to 'do the homours', aided by Lurcio.

Ludicrous is promoting a bill in the Senate to close down the local brothels. This brings him into conflict with the brothel keepers, who plot to ruin the Vestal Virgins ceremony.

Ludicrus becomes involved in a plan to assassinate Julius Caesar. Ammonia gives Lurcio the job of foiling the plot. Lurcio is arrested and taken to Caesar's lieutenant, Ponderous. He's forced to impersonate Caesar in an attempt to catch the plotters.

When the Olympia Theatre Company comes to town, Ammonia sends Lurcio to the theatre with a note for one of the actors, who's one of her old flames. At the same time Ludicrus wants Lurcio to deliver a note to one of the actresses.

Lurcio is given the night off when everyone goes out. Ammonia, Ludicrus and Erotica each give him money so that he'll be out of the house for the evening. Lurcio, however, has other ideas. He's expecting a visit from new neighbour, Lusha. He uses the money to buy a love potion and looks forward to a night of pleasure. Everything goes according to plan ... until the various members of the family sneak back home, expecting the house to be empty.