Yan, a selfish 24-year-old, exploits a time-loop until he discovers Kai, a struggling 40-year-old, is also trapped. When the loop moves forward, Kai sees his newborn son, and Yan's recklessness leads to his arrest.
Trapped in a time loop, Kai and Yan face their actions' consequences. Yan endures his mother's criticism and Chloe's rejection, while Kai uncovers Ting Ting's infidelity and leans on his brother Hao.
Still trapped in the loop and pursued by police, Yan and Kai turn to Agatha, who reveals the loop's secrets and urges them to repair connections. Believing they control the loop, they exploit it before moving forward.
Yan and Kai pursue Agatha, always one step behind a taunting, mysterious man. Despite their efforts, they're caught in a cycle of setbacks. A clue leads them to their workplace, where they enlist Chloe's help.
Chloe adapts to the time loop, mastering the repeating day. Initially focused on survival and duties, frustration sets in as the cycle persists. She teams up with Yan and Kai to confront Henry, whom she suspects is behind it all.
He trio examines the flask's contents: a password-protected PDA, an engraved poem, and clippings of Agatha's achievements. Realizing the Bao Ding Balls control the loop, they plan to capture Henry. At the nursing home, they trap him.
In 1992, Henry, an ambitious astrophysicist, and Agatha, a librarian, fall in love and discover a meteorite that activates time loops. Henry's obsession strains their relationship, leading Agatha to destroy the meteorite.
In a new universe, Chloe discovers she is pregnant with Yan's child, while Kai has three children with Ting Ting. They find Agatha, now a marathon runner who doesn't recognize Yan. Henry collects Agatha's tears.
In a different universe, Yan, Kai, and Chloe find Agatha as a tech CEO, while Kai is a boxer at Ming's club. Henry, afflicted with "Bad Actor Syndrome," is held captive by Ming, who gains the Bao Ding Balls.
Yan, Chloe, Kai, and Henry journey through various universes, including a pant-less universe, a mime universe, and an AI universe where everyone has personalized AI. In the AI universe, Chloe discovers her sister Kit is alive.
Kai becomes the star of a reality TV show called "Kai's Happy Life!" Initially thrilled to see a grown-up Toro and kind Ting Ting, he soon realizes it's all scripted, with Toro as a child actor. Kai uncovers that the show mocks his life.
Yan becomes a famous poet, supported by his greedy father after his mother leaves. Kai, now a feared mob boss, discovers he has a son and feels content in this universe. Henry and Chloe attempt to collect Agatha's tears but fail.
Chloe finds Yan's mom for help, prompting Yan to realize his father's enabling behavior. Kai tries to show Toro he's changed, but Mr. Red Leopard threatens his family. Realizing his power and wealth command respect, Kai refuses to leave.
Yan and Henry escape with Toro's help, leaving Chloe as a hostage. They find refuge at Yan's mom's house and retrieve the PDA. At Agatha's ward, Henry uses the collected tears, awakening a supercharged Agatha.
The shattered Bao Ding ball throws them into a chaotic realm where time and space are distorted. They are rescued by the real Agatha, living in The Void. To help them return, Henry makes the ultimate sacrifice by staying behind.
