Ed returns from his Moroccan trip with shocking news about his past; Danny and Delinda's romance heats up; Mike travels to Hawaii to help Sam with her whale problem.

The robbery of a rare violin from the hotel safety deposit vault seems to mix in with the murder of its owner which brings Jordan and Woody out from the Boston Police Department. Danny and Delinda move in together and Mike is assigned to find a rat that's been missing and running around the hotel for some time.