Steven and Devon are brothers who were estranged for 15 years. Death is what brings them back together.
This is done telepathically. Steven is killed of the coast of an imaginary Caribbean island in a drug deal gone bad. While he is dying he taps into a higher consciousness and starts conversing with Devon who is undergoing chemotherapy. During the conversation, Devon slips in and out of consciousness, and he tries to understand the different stages of death. During this ordeal, the brothers seek closure by talking about why they were estranged and what their paths were. After a while, they use images instead of words to converse.
Devon accuses his brother of abandoning the family after their father died and the family business went under. He is also upset that Steven didn’t return to visit their dying mother. All of this takes place in an alternative reality, where the line between the world of the living and the dead becomes blurred.
It is not certain if Devon is really having this experience, as he is in a hospice where he is highly medicated with Percocet and other Opioids.
Thank you for your valid summary.