The song "S.O.S." by Hurts tells the story of a relationship that is falling apart and the desperation of one person trying to save it. The lyrics imply that there has been a significant event or argument that has caused a rift between the two individuals. The song begins with the protagonist trying to reach their significant other late at night, hoping to understand what went wrong and seeking reconciliation. They are aware that time is running out and the relationship is in jeopardy. The reference to one o'clock and four o'clock in the morning suggests the late-night despair and urgency. The chorus expresses the desperation of the situation, using the metaphor of a halo that has lost its shine due to rust. The protagonist is appealing to their partner to give the relationship one more chance and questioning when their heart lost its desire to fight for the relationship. The repeated plea for help through an S.O.S. signifies the desperation and plea for assistance in saving the relationship. Throughout the song, there is a contrast between the initial blissful stage of the relationship ("first day of my life") and the current downfall. The protagonist remembers when their partner entered their life like an angel with a halo but laments that it has now lost its radiance due to the challenges they are facing. Overall, the song "S.O.S." conveys a sense of desperation, reflecting the struggles and yearning to salvage a failing relationship.