In the town of Tarabiscoville, Amaya, Greg, and Connor become the superhero team PJ Masks when night falls in order to fight enemies and rivals such as Romeo, Luna Girl, Night Ninja, The Wolfy Kids, Motsuki, Octobella, Pharaoh Boy, Munki-gu, Orticia (former), Pirate Robot (former), The Speedy Twins and Gloop the Third (former) to keep them from ruining people's days.

Amaya becomes Owlette (an owl), Greg becomes Gekko (a lizard), and Connor becomes Catboy (a combination between cat and boy).

PJ Masks (known as "PJs" for short) is the titular superhero team that fights crime at night to keep it from ruining people's days.

By Season 6, the PJ Masks form a new superhero team: The Power Heroes, to increase crime fighting.

[5] The series was renewed for a second season consisting of 52 11-minute segments in June 2016;[6] it premiered on 15 January 2018.