Complete story — includes the ending
Hayley's MI6 friend asks her to break into a building and load spyware into a computer for proof of an affair. Hayley and a partner break in, and the plan goes off without a hitch, but Hayley's partner is found dead in the same building the next day. Hayley must find out the real reason for the spyware, while making sure the precinct doesn't know she was involved. She comes clean just before it is unveiled that the spyware was a worm that collapsed London's power grid and she is the apparent patsy.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Castle season 8. HTML formatting and reference markers removed. · Content license