Milton Sills once again thrilled his legions of female fans in The Sea Tiger. This time, Sills is cast as Julian Ramos, a fisherman in the Canary Islands. As the guardian of his hotheaded younger brother Charles (Larry Kent), Julian regards it as his duty to protect the boy from women -- and vice versa. When Charles begins pitching woo at aristocratic Amy (Mary Astor), Julian runs interference by pretending to be in love with the girl himself. As time passes, of course, he stops pretending. When Charles proves to be a cad, Amy realizes that Julian is truly the man for her.
by Hal Erickson synopsis