the little fish who was unconscious due to the "mysterious talisman" was brought back by the fish father bbb。 the little fish suddenly woke up, behaved strangely, and was involved in mysterious and touching elf stories. the childhood sweetheart a ling provided help to yu daddy and also created ambiguous sparks, but the quirky a ling hid yu daddy and xiao yu, as if something was brewing. yu dad slowly discovered the strangeness of xiaoyu, but it created a new bond. the emotional entanglement between real and fake xiaoyu made the trip to his hometown confused. who exactly occupied the xiaoyu's body? what did a ling hide? where is the real little fish? when yu dad clears away the fog step by step, how will he face it...