With the assistance of his old friend Zeke, Mark chases down a lead that might help him finally discover a cure for Eleanor. Without Mark's approval, Eleanor sneaks off to Isaiah's talent show while Naomi discovers an unsettling pattern to this string of local murders. Claire, newly reunited with her brother, is forced to make an all-important decision about her future.

Upon learning that Naomi is a homicide detective, Mark covers the tracks of his most recent crime. Eleanor discovers that Isaiah is being bullied at school and seeks revenge. Naomi and her partner Ben make a massive discovery in their case, but it comes at a cost. Meanwhile, Claire is on the brink of a major breakthrough in her own right.

Mark and Zeke celebrate the restaurant's tenth anniversary and it ends with an unexpected bang. Meanwhile, 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 moves quickly to clean up a mess, and Zeke gets roped in to help. Claire is hit with a major setback at the lab and Matthew proposes a solution. Meanwhile, Naomi makes a devastating discovery that confirms her worst fears.