13 Reason Why Season 2

In season two, months after Hannah's suicide, Clay and the other people mentioned on the tapes, as well as close friends and Hannah's family members
Become embroiled in a civil legal battle between Hannah's parents and Liberty High School
Alleging negligence on the part of the school, Hannah's mother pursues her perception of justice
While her reluctance to settle pre-trial and her personal circumstances eventually break up her marriage with Hannah's father
The story unfolds with narratives illustrating Hannah's story told by those who present in court at trial

Clay, who perceives himself as Hannah's failed protector
Embarks on an investigation using whatever evidence he can find in an effort to impact on the civil case between Hannah's parents and the school
Clay also endeavors to expose the corrupted culture of the high school and its favor of wealthy jocks over the average student
Which especially compromises the integrity of young girls such as Hannah

Throughout season two, Clay appears to be communicating with the ghost of Hannah as a plot narrative device