Explore the intricacies of multitenancy in Spring Boot applications through an engaging conference talk that uses a mystery-solving narrative. Dive into the world of modern SaaS solutions, focusing on scalability, resilience, and cost efficiency while ensuring proper isolation, security, and data control among tenants. Learn how to implement multitenancy in Java and Spring by following a detective mission to uncover a stolen guitar in a rockers-only residential building. Discover techniques for storing data securely, configuring authentication and authorization, and enabling observability using Java, Hibernate, Keycloak, and Spring. Gain practical insights into interrogating tenants, analyzing facility staff routines, and reviewing surveillance footage as metaphors for implementing multitenant architectures in modern Java applications.