The Trix witches, long-time foes of the Winx Club, join forces with the malevolent nymph Politea and discover that to finally vanquish the fairies and achieve invincibility, they need only one thing: a Pearl concealed in the depths of the Infinite Ocean. Despite its small size, the Pearl of the Depth bestows immense power upon its holder. The Winx must act swiftly to thwart their adversaries’ scheme before time runs out. Brace yourself for the Winx’s most perilous mission yet!