16 year old Joan Girardi is approached by someone claiming to be God. He gives her a mission, get a job. Will Girardi, Joan's dad and new chief of police for Arcadia, is trying to solve the case of a serial killer.

Joan enrolls in advanced-placement chemistry, after God asks her to stop being an underachiever; Will ruffles feathers during an arson investigation.

God encourages Joan to learn how to play chess; Will must work with a psychic on a missing toddler case; Helen hopes a miracle will enable Kevin to walk again.

Helen fears Joan is becoming eccentric when she enthusiastically tackles her boat-building project; Will encourages Kevin to join a wheelchair basketball team.

Joan learns from God that she's holding a garage sale on Saturday, which doesn't leave her much time to sort through her family's unwanted belongings. Among the items she unearths are paintings created by Helen during a dark period in her life. Elsewhere, Will goes to bat for a rape victim even though the district attorney feels the case isn't strong enough. Also, Joan catches the interest of a class charmer and a newspaper job falls right into Kevin's lap.