Jack is grappling with profound emotional turmoil a year after the tragic loss of his brother. In an effort to help him find peace, his friend and his brother's former girlfriend, Iris, invites him to stay at her father’s secluded island cabin. Upon his arrival, Jack encounters Iris's sister, Hannah, a lesbian who is currently dealing with her own heartbreak after a breakup and is staying at the cabin without Iris being aware of her presence.
As they share drinks, a fragile bond forms between Jack and Hannah, culminating in an intimate encounter utilizing a condom that was intended for protection. However, the morning light brings unexpected tension when Iris shows up at the cabin, prompting Jack to suggest that he and Hannah keep their night together a secret from her. To further complicate matters, Iris confides in Hannah that she has developed feelings for Jack.
The following day, Iris reveals that Hannah is contemplating motherhood. Unbeknownst to them, Jack inspects the used condom and discovers that Hannah had intentionally damaged it. In a vulnerable moment, Hannah admits to Iris about their night together, leading to a heated confrontation with Jack, who accuses Hannah of "stealing" his potential fatherhood. Hannah confesses her motivations, claiming that she wouldn't have acted on her feelings if she had known about Iris's affections for Jack.
The emotional storm escalates when Jack expresses remorse to Iris, confessing that his relationship with Hannah was merely an escape from the truth of his feelings for her. This revelation leaves Iris devastated, reflecting on what might have been had they been more honest with one another sooner. Both Jack and Iris find themselves overwhelmed with emotion, and Jack decides to leave the cabin to process the situation. Meanwhile, the sisters begin to mend their relationship, with Iris offering her support to Hannah should she decide to have the baby.
In a turn of fate, Jack makes his way back to the cabin, finally reciprocating Iris's feelings and committing to helping Hannah with her possible journey into motherhood. The trio heads back to the city together, culminating in a poignant scene where Hannah prepares to take a home pregnancy test, with Iris and Jack by her side, anxiously awaiting the outcome of this life-changing moment, which remains undisclosed.
