Mitch Buchannon, Hobie, Eddie and Shauni travel to northern California's rugged gold country, with C.J. as their guide, to investigate the death of Mitch's prospector uncle where they find an old treasure map leading to a valuable gold nugget along a rough river. Back at Baywatch, two new recruits show up for rookie training season who are the wealthy and spoiled teen Matt Brody, and lower class swim champion Summer Quinn who moves to California with her divorced single mother looking to escape from an abusive past.
在《复仇者联盟4：终局之战》的结尾，美国队长将盾牌交给了猎鹰（安东尼·麦凯饰），相信他能够继承美国队长的精神。此后，“猎鹰”萨姆·威尔逊和“冬兵”巴奇·巴恩斯（塞巴斯蒂安·斯坦饰）联合参与了一场全球性冒险行动，他们的能力和耐心受到考验 [39]。“美国队长”史蒂夫·罗杰斯卸任、灭霸被终结后，这个世界依旧不宁静。猎鹰继承了美国队长头衔之后美国政府对此心存抵触 [22]。“泽莫男爵”赫尔穆特·泽莫（丹尼尔·布鲁赫饰）似乎还要捣乱，猎鹰与冬兵出任务时还遇到了美国队长的前女友莎伦·卡特（艾米丽·万凯普饰） [1
