Apparitions, oddities, and gods continue to manifest around Koyomi Araragi and his close-knit group of friends: Tsubasa Hanekawa, the group's modest genius; Shinobu Oshino, the resident doughnut-loving vampire; athletic deviant Suruga Kanbaru; bite-happy spirit Mayoi Hachikuji; Koyomi's cute admirer Nadeko Sengoku; and Hitagi Senjougahara, Koyomi's eclectic girlfriend.

A new semester has begun and with graduation looming over Koyomi, he must quickly decide the paths he will walk, as well as the relationships he will form and friends that he will save. But as strange events begin to unfold, Koyomi is nowhere to be found, and a vicious tiger apparition has appeared in his absence. Hanekawa has become its target, and she quickly finds she must fend for herself.

Monogatari Series: Second Season adapts all but the third volume of NisiOisiN's light novel series of the same title. The third volume's adaptation, Hanamonogatari, was aired separately in August 2014. The complete Blu-ray release includes each arc under its novel title and places Hanamonogatari between episodes 11 and 12 of Monogatari Series: Second Season to reflect the original novel order.