A third storyline is focused on the figures of Marcus Livius Drusus and his sister Livia Drusa who both feature more prominently in "The Grass Crown": and their own growing friendship with the Servilius Caepio family resulting in a double marriage, which proves disastrous when Quintus Servilius Caepio Senior is not only accused of embezzling more gold than there was in the Roman Treasury, but also is responsible for Rome's most disastrous military defeat for generations – a defeat which so ruins the credibility of the conservative leaders of the Senate that it lets Marius into power far earlier than he expected, and for a longer time.