神秘的星艦發現號艦長加百列·洛卡攔截麥珂的太空梭，還命令她加入一場危險的收復任務。

沃克在成就塔庫夫馬的大業時面臨巨大的挑戰，而麥珂找到可望解決船艦推進問題的方法。

洛卡遭克林貢人綁架，還跟一個古怪的傢伙關在一起。麥珂雖然有所懷疑，發現號依然奉命出發救人。

洛卡無視直接命令，派遣伯翰和泰勒登陸敵方旗艦，展開關閉克林貢隱形裝置的任務。

泰勒努力對付創傷引發的壓力，孢子驅動系統的災禍則讓發現號困在平行宇宙之中，許多角色也隨之顛倒。

當麥珂違抗皇帝，與隱密的反抗軍神秘領袖聯絡時，堤利提出激進的做法以拯救斯塔麥。

After answering a distress signal from the U.S.S. Enterprise, the U.S.S. Discovery welcomes aboard Captain Christopher Pike and begins a new mission to investigate the meaning behind seven mysterious red signals. Michael Burnham grapples with her past growing up on Vulcan with her foster parents and brother Spock.

A new signal appears, prompting Stamets' emotional return to the mycelial network and leading Burnham, Pike and Owosekun to a pre-warp planet, where they face a complex ethical dilemma. Tilly's overeagerness lands her in trouble but when the planet - and Discovery's landing party - are threatened, her curiosity may be the one thing that can save them.

A surprise visitor to the U.S.S. Discovery brings shocking news about Spock and dredges up past regrets for Burnham. Following the asteroid incident, Tilly struggles to keep a grip on her reality. L'Rell's authority on Qo'noS is threatened.

A mysterious sphere threatens the U.S.S. Discovery even as May, in her original form, implements a plan that puts Tilly's life in danger. Saru and Burnham's bond grows when Saru is forced to acknowledge a deeply unsettling Kelpien truth. Pike receives new intel on Spock from a loyal friend.

Burnham and the crew navigate a dangerous alien landscape in a race against time to save Tilly's life, but Stamets is not at all prepared for what they find in the process. Section 31 is assigned to help track down Spock, much to Pike's dismay.

When a new signal appears over Saru's home planet, Burnham, Saru and the crew embark on a perilous mission that puts Saru in danger and raises questions about the Red Angel's intentions. Hugh struggles to come to terms with his new reality.

Burnham goes to Vulcan in search of Spock, where she unearths surprising family secrets. In researching what is left of the Red Angel's signal over Kaminar, Pike and Tyler end up in battle with time itself. Georgiou has a few tricks up her sleeve for Leland and Section 31.

Spock and Burnham head to Talos IV, where the process of healing Spock forces the siblings to confront their troubled past. Stamets desperately tries to reconnect with Hugh, while Tyler struggles to shed the crew's suspicions of him due to his past as Voq.

A fourth signal leads the U.S.S. Discovery to a world where Pike is forced to make a life-changing choice. Burnham and Spock investigate a Section 31 ship gone rogue, leading to a discovery with catastrophic consequences.

When the U.S.S. Discovery's crucial mission does not go according to plan, Burnham realizes what must ultimately be done. The crew prepares for the battle of a lifetime as Leland's Control ships get closer.

The U.S.S. Discovery battles against Control in a fight not only for their lives but for the future, with a little help from some unexpected friends. Spock and Burnham discern vital new connections between the red signals while Burnham faces one of life’s harshest truths: the right decisions are often the hardest to make.

Burnham and Adira visit the Trill homeworld while Saru's efforts on the Discovery to help the crew reconnect yield surprises.

After receiving a message from Book, Burnham and Georgiou embark on a rogue mission to find him, leaving Saru to pick up the pieces with Admiral Vance. Meanwhile, Stamets forms an unexpected bond with Adira.

While grappling with the fallout of her recent actions, and what her future might hold, Burnham agrees to represent the Federation in an intense debate about the release of politically sensitive - but highly valuable - Burn data.

The U.S.S. Discovery crew journey to a mysterious planet in hopes of finding a cure for Georgiou's deteriorating condition. Stamets and Adira make a stunning breakthrough with the newly acquired Burn data.

As the Emerald Chain tightens its grip and the mystery of the Burn is finally solved, Burnham and the crew have one last chance to save themselves - and the Federation.