To inform each personally about her impending death, Mies summons her three daughters home. The three half-sisters April, May and June, each of whom has a different father, start to question their lives: "Where are we at in life? What do we still have in common? What will happen to our autistic brother Jan?"

Sleuthy foster siblings Max, Tess, Sal, Anika, and Daniel Hunter find new quests, more mysteries, and even new Hunter sibs!

Felix Winterberg is the great-great-grandson of the famous Albert Einstein and himself a recognized physics genius. Because of a deadly hereditary disease, the brilliant researcher only has a few years left - which he wants to make as labor-intensive as possible thanks to various illegal stimulants.

Coming home to make amends with her estranged father, Eleni finds herself confronted with an unexpected kinship.

Unsure of what to do next, 23-year-old Marnie tries her best to navigate life after college. Still partying like there's no tomorrow, Marnie drags herself out of bed for her miserable temp job and can't decide whether she's wasting her time going after best buddy Alex, who doesn't seem to be interested.