Tyrion visits Varys, learns that his hard work is being undone by Cersei and Tywin, and doesn't learn much about Ser Mandon's attempt to kill him. He does know that Mandon is a bit boring and straight-laced, and not the type to kill people unless ordered to. I suspect there is something mysterious about Mandon that will be revealed later.
Mostly Tyrion is thinking with his nethers again and wants to see Shae. Varys arranges it; Shae reminds him of his promises about jewels and a manse. Tyrion wants to send her away for her own safety (she'll be hung if Tywin finds out about her) but ends up telling her she can stay. I suspect this is going to turn out to be a great tragic story arc.
I have to admit Tyrion chapters were a lot more interesting when he had power and influence. I hope he regains some.
