The saying goes that life unfolds while we're occupied with other things, and that sentiment applies to Sam (Colin Firth) and Tusker (Stanley Tucci). They are on a road trip across the English countryside, visiting people they know and places important to their shared history. As they recall memories from their long relationship, everything appears to be progressing smoothly—until Sam discovers Tusker standing in the street, disoriented and unsure of his location. Don’t categorize “Supernova” as simply another film about dementia; that seems to be a prevalent subject recently. Writer/director Harry Macqueen's understated story of morality and love rises above ordinary sadness with an atmospheric sense of melancholy stemming from his economical (and impactful) narrative style. This movie embodies grief. It’s shown that Tusker was a writer who can no longer work, while Sam is a pianist who has paused his own ambitions to make the most of what might be among the few chances left to share time with the person he loves. They struggle with a lessening sense of routine, and a painful secret emerges indicating they have contrasting visions for their future. Firth and Tucci deliver some of the finest performances of their careers. The connection between them is central to the film’s power. Their portrayals are deeply affecting, and it's distressing to witness the emotional strain caused by a severe illness beginning to set in. Tusker confronts his declining condition with humor and candor, determined to maintain control over his own life. Sam is prepared to give up everything he is and has just to care for and spend another moment with his partner, and he’s finding it hard to accept what lies ahead. It's a straightforward depiction of the clash between practical considerations and emotional needs when facing an inevitable end. Macqueen’s script contains honest, unfiltered writing and poignant dialogue. There isn’t anything in this film that feels fabricated, which is why “Supernova” succeeds so well at representing the nature of life, death, and love.

Source on TMDB