Plot summary
As Mr. Yang's ( Ally Sheedy ) book is released, Shawn and Gus meet up with Mary Lightly ( Jimmi Simpson ), who believes that Yang had a partner (Christopher Turner), and he turns out to be right when a dead body ( Beverley Turner ) turns up. As another murder is committed, Shawn, Gus, Juliet, Lassiter, and Henry find themselves in scenarios from classic Hitchcock films in order to stop Yin. Just like Yang, Mr. Yin makes it personal when Abigail ( Rachael Leigh Cook ) is dragged into his game. However, she is not the only victim...
Credits
Adapted from Wikipedia contributors, Psych season 4. HTML formatting and reference markers removed.