Due to the death of his brother Chen Shubai, gastroenterologist Chen Ci married Chen Shubai's comrade Zhou Shiyan, but they gradually became estranged due to misunderstandings about "responsibility" and "dependence". Zhou Shiyan's ex-girlfriend Qiao Yanxin appeared, exacerbating the conflict, and Chen Cixin filed for divorce.
After the car accident, Chen Ci (Big Ci) traveled back to three years ago - his brother was still alive, and Zhou Shiyan (Xiao Yan) and Qiao Yanxin had not broken up. She hid her secret love and just wanted her brother to be well. Unexpectedly, Xiao Yan fell in love with her and refused Qiao Yanxin's marriage. At the same time, Zhou Shiyan (Dayan) was seriously injured in the mission and traveled back in time. He persisted in pursuing love. The two resolved their misunderstanding and held their wedding again.
However, his brother's death in a car accident triggered a cycle: Da Ci returned three years later, Chen Ci (Xiao Ci) from three years ago returned, saw that he was married to Dayan, and quit after understanding the truth; three years after Dayan arrived, Xiao Yan returned and was told that he and Xiao Ci were married, but Xiao Ci mistakenly believed that Xiao Yan loved Da Ci because they had no common memories. In the dislocation of time and space, love and truth urgently need to be broken.
Intention: Going in both directions is the destination of love, and refusing to be bound and sacrificed unilaterally