I Not Stupid 3: Wang Zi Hao, a Chinese Primary 6 student from Shanghai, China residing in Singapore, faces academic pressure when his new classmate Jayden Lee Jun Wei frames him for cheating to maintain his top-ranking status. Meanwhile, Zi Hao's Mother, Wen Ting, is falsely accused of illegal work by Jayden's competitive mother, Sophia. Amidst the turmoil, the two mothers realise the toll on their sons and unite to prioritise their well-being over grades, fostering reconciliation.