A new surprise arrives in Pocoyo's world! His little sister Bea bursts in full of energy, sweetness, and a huge desire to play. Everyone falls in love with her Elly, Pato, even the Narrator. But Pocoyo starts to feel a bit left out as Bea wins everyone over. While she mimics her brother and charms their friends, Pocoyo begins to wonder is Bea a threat to his place in the group, or someone very special to share new adventures with?