在意大利的一个美丽海滨小镇上，一个名为卢卡的小男孩与好朋友们一起渡过难忘的夏天，过程中充满了冰淇淋、意大利面和摩托车。然而，路卡却有一个秘密——他是来自水底世界的海怪，且只要一接触到水，就会原形毕露……
Jacob Tremblay
Luca Paguro (voice)
Jack Dylan Grazer
Alberto Scorfano (voice)
Emma Berman
Giulia Marcovaldo (voice)
Saverio Raimondo
Ercole Visconti (voice)
Maya Rudolph
Daniela Paguro (voice)
Marco Barricelli
Massimo Marcovaldo (voice)
Jim Gaffigan
Lorenzo Paguro (voice)
Peter Sohn
Ciccio (voice)
Lorenzo Crisci
Guido (voice)
Marina Massironi
Signora Marsigliese (voice)
Gino La Monica
Tomasso (Old Fisherman) (voice)
Sandy Martin
Grandma Paguro (voice)
Giacomo Gianniotti
Giacomo (Young Fisherman) (voice)
Elisa Gabrielli
Concetta Aragosta (voice)
