After 10 years away, Mark Kane and his daughter, Eleanor, return home to New York City; their neighbor Naomi, an NYPD detective, investigates a brutal murder; Claire receives a call from her estranged father.

Mark chases down a lead that might help him discover a cure for Eleanor; Eleanor sneaks off to Isaiah's talent show while Naomi discovers an unsettling pattern in a string of murders; Claire is forced to make an important decision about her future.

Upon learning that Naomi is a homicide detective, Mark covers his tracks; Eleanor seeks revenge for Isaiah; Naomi and her partner Ben make a massive discovery in their case; meanwhile, Claire is on the brink of a major breakthrough.

Mark and Zeke's restaurant anniversary ends with a bang; Eleanor and Isaiah sneak out for a night of magic, wonder, and danger; Naomi struggles with new developments in her case while Claire makes great strides.

Mark takes Zeke's help to clean up a mess; Claire hits a major setback, and Matthew proposes a solution; Naomi makes a deadly discovery.

When Mark, Naomi and Ellie work together to throw Isaiah a birthday party, complicated feelings arise; Claire starts to form a bond with Matthew and takes her research to a new level.