Three children become superheroes at night. During the school day a problem arises, and during the night the culprit is found by the PJ Masks and the problem gets solved by sharing ideas, recognizing strengths and weaknesses, and the ability of working together to get the problem solved. Everything is made right for the children the next day thanks to the PJ Masks. Because bedtime is the right time to fight crime. 讲述的是三位主人公，6岁的康诺、艾玛亚和葛瑞，在白天的时候，他们就像普通小孩一样去上学。但当这个城市发生危险时，这群充满好奇心和正义感的孩子们便会在夜里穿上睡衣，并激活他们的动物护身符。神奇地变成动感超级英雄，猫小子、猫头鹰女和飞壁侠，成为睡衣小英雄。他们一起对抗罗米欧、月之女和夜幕忍者这群夜间坏人们，阻止他们一系列的破坏行为。
