CJ7 blends Stephen Chow's signature slapstick humor (kung fu-style fighting, gross-out gags, absurd situations) with a genuinely moving story about . The film argues that a parent's love and a child's happiness are far more valuable than wealth or perfect test scores.
The emotional heart of the film comes when Ti, working on a high scaffold, gets distracted and suffers a fatal fall. At the hospital, Ti dies. A grief-stricken Dicky sobs alone at home until CJ7, seeing his sadness, uses all its life force to heal the father. The process works—Ti is resurrected—but the effort drains all of CJ7's energy, and the creature turns into a lifeless, stuffed doll. CJ7 blends Stephen Chow's signature slapstick humor (kung
Dicky is devastated, believing CJ7 is dead. He buries the doll. However, days later, a whole new generation of tiny alien "CJ7s" hatches from the orb, all just as cute and rambunctious as the original. Meanwhile, Ti’s near-death experience has softened him; he no longer pressures Dicky about grades and embraces a simpler, happier life with his son. The film ends with Dicky and his father happy, as a new, baby CJ7 watches over them. At the hospital, Ti dies