This song, "Chemical Reaction," showcases an intense musical clash between Honey Lemon in her superhero form and Baymax, who is wreaking havoc in his red armor designed by Hiro Hamada. Baymax is causing destruction in his home city of San Fransokyo, seemingly due to a malfunction stemming from a corrupted version of Tadashi's healthcare chip. Hiro had attempted to replicate Baymax's doctor chip, saying, "I'm copying your doctor's chip," but this decision led to a catastrophic error, transforming Baymax from a caring healthcare companion into a violent threat. The pressing question remains: can Hiro and his friends remove the corrupted chip and restore Baymax to his original self before it's too late, or will they witness the devastation of San Fransokyo and the loss of countless lives, including their own?