There's tres leches trouble in this all-new adventure! The annual neighborhood rooftop party is tomorrow, and Ronnie Anne can't wait to bring the tres leches cake that she helped her abuela make. But while she's supposed to be guarding the cake against hungry family members, it goes missing! Ronnie Anne and her best friend Sid are on the case. But then the trail runs cold, and nothing goes as expected! Can Ronnie Anne save the cake--and save face--in time for the party?