Olivia and Andy Baker find their lives torn apart in the wake their daughter's suicide. During Andy Baker's testimony, we learn the Bakers' marriage stood on shaky ground prior to the tragedy and that Hannah caught her father cheating with another woman. A series of flashbacks show Hannah threatening to tell her mother when her father refuses to confess. Eventually, we learn that the unnamed mistress is Andy's current live-in love interest.
Intertwined with the aforementioned storyline, we find Olivia Baker struggling to make sense of her daughter's secrets by pouring over her poems only to find the entries Olivia originally believed to be about Hannah's school woes are actually a reflection of the struggles experienced during her parents' tumultuous partnership.
Season two ultimately leaves the door open for Olivia and Andy's marriage to be restored.