It's tough working nights with the NYPD. The crime rate is high, the hours are terrible, and forget about a personal life. So when Officer O'Reilly and her K-9 Rolf switch over to the day shift, things are looking up. She's even able to find time for a new boyfriend.

But when the theft of a priceless painting from the Queens Museum leaves a fellow police officer dead, Erin and her four-legged partner find themselves dealing with dangerous criminals, sleazy art dealers, and obstructive detectives in a race to capture the killers...and just maybe bring closure to a 75-year-old crime.