When a tourist is murdered in Ka'anapali, and it turns out he's someone from Rosie's past, Charlie is on the case. She needs to find out whether or not the man knew about Rosie's defection, or if it's just a coincidence he was killed on the island. And while the stakes couldn't be higher, Charlie finds herself butting heads with the FBI, at the same time as she's getting closer to Jake than ever. And she's not sure that's a bad...