 Needing a fish for a special meal, Sisters Bertrille and Sixto go to Sister Sixto s Uncle Gus Mendoza, who she considers the most expert fisherman in San Juan. However Uncle Gus has been a little low on his fishing luck, and secretly grabs a fish for the sisters from Lily s Fish Shack, owned by Lily Romano. Apparently, Uncle Gus  luck is due to the the larger fishing companies, who have modern technology, such as sonar and helicopters, to locate schools of fish before someone like Gus can get to them. Gus has been financially supported by his family as well as Lily. But Lily is facing problems of her own as her shop is behind on payments and the bank is threatening to foreclose. To solve everyone s problems, Sisters Sixto and Jacqueline suggest that Sister Bertrille be Gus  overhead fish spotter. They figure she can get away with doing so if she flies between Gus and the sun since Gus is near sighted, so wouldn t be able to tell that it s her flying overhead. She does so. It works, and Gus doesn t know that it s Sister Bertrille leading him to the fish. He thinks she s his Patrona, Santa Rosa. With his earnings, Gus is able to pay back Lily. The problem arises that Sister Bertrille can t do this for Gus forever, especially from the Reverend Mother s perspective. When Sister Bertrille stops showing, Gus thinks Santa Rosa has deserted him. Lily is still facing her problems as the money from Gus isn t sufficient to placate the bank. The major challenge is to convince Gus that the fishing industry has changed and that he needs to find a different way to earn a living. When Sister Bertrille tries to do so, she tells him of Lily s problems. In love with Lily, Gus decides that what s best for everyone is to sell his boat and to go into business with Lily.