“Isabellae” is a song about pursuing ambitious goals and the hard work required to achieve those goals. The English title is a deliberate misdirect as listeners assume it is a song about a girl named Isabelle/Isabella. To illustrate this, MCs MaSiWei, Melo and Psy.P use the sustained metaphor of butterflies' 蝴蝶 metamorphosis (as in the Chinese title) and mountains (specifically, the Alps 阿尔卑斯山).

The track is produced by Kanye West collaborator Charlie Heat. Label 88Rising called it a “modern day symphonic banger”.