Explore the complexities of distributed systems in this insightful conference talk that delves into the challenges of implementing a seemingly simple checkout page. Learn how six lines of code can hide potential failures and system-wide issues. Discover strategies for building resilient distributed systems, including examining inevitable failures, addressing coupling in code, and refactoring towards a truly robust checkout process. Gain valuable insights into handling failures between systems, dealing with external resources like payment gateways and email services, and implementing patterns such as routing slip, saga, and process manager. Understand the importance of embracing the fallacies of distributed computing and planning for worst-case scenarios to create more reliable and fault-tolerant applications.