A new neighbor who seems to be living a double life complicates Jack's dual existence as a janitor by day and a rocket engineer at night.
Ernest's towering presence causes Jack and Susan anxiety as they set out to form the first-ever rocketry squad at Caltech.
Ernest extends an invitation to the Parsons to attend one of his group's covert sessions and promises to fulfill their aspirations. Jack, feeling pressurized, advises the team to start testing experiments at full intensity and take risks.
The rocketry team receives an invitation to the Athenaeum thanks to Jack's testimony as an expert witness in a well-known trial. Virgil leaves Susan's disobedient teenage sister behind for a chaotic weekend.
The crew completes their prototype, but Jack is skeptical that it will work. Susan gets to know Maggie better, and Ernest teaches Jack about Thelema's power using a mind-bending elixir.
Jack is left wanting more during a covert return trip to the Agape Lodge. Richard is unsure of the project after Ernest shows up unexpectedly at the rocketry team's brand-new testing site in the desert. Maggie questions Ernest's loyalty.
Jack ventures deeper into the worlds of Thelema and sex magick as Richard and the gang leave the Suicide Club in favor of other things. Susan becomes increasingly concerned about Jack as she learns more about Aleister Crowley.
Jack and Thelema become closer, Susan looks for explanations for Jack's actions, and Richard takes a flight to Washington, D.C., to deliver the team's proposal to the Department of War.
Susan discovers that Thelema might hold the key to comprehending her own psychological pain. Jack must choose between giving Susan the life she wants and pursuing his shared passion with Richard for the rocketry team after receiving a promotion at Pueblo Powder.
Richard and Jack eventually come to terms with their differences as Jack receives a letter from Aleister Crowley encouraging him to advance to the next degree. Susan must face the reality of Virgil.