A secret return visit to the Agape Lodge leaves Jack wanting more, inspiring him to explore new sexual boundaries at home with Susan, despite her misgivings. Ernest's sudden presence at the Rocketry Team's new desert testing facility has Richard questioning the whole endeavor, until he meets a mysterious woman who helps restore his faith. Meanwhile, Maggie has doubts about Ernest's fidelity.

The U.S. Military offers Jack, Richard and the Aerojet team a classified mission that could turn the tide of World War II, but which comes with increased scrutiny of Jack's personal life. As Jack strives to straddle the worlds of mysticism and science, Virgil Byrne's crusade against the Agape Lodge forces Jack and Susan to offer the cult safe haven in their Pasadena mansion, only to have their lives further disrupted by the return of Ernest Donovan, who has come back to Los Angeles more broken than ever.

The Magus invites Ernest to stay at the Parsonage, leading Jack to question both men's motives. Richard discovers that Marisol has been hiding a secret from him that could jeopardize their relationship. In an effort to join the ranks of the Agape, Patty shares a shocking discovery with Jack. And with the new rocketry project already on the ropes, Jack finds help from an unlikely source, Aleister Crowley himself.