The movie 5 in 1 tells the story of a wealthy man named Robert who unexpectedly passes away, leaving his fortune to his most beloved ex-girlfriend, Lily. However, at his wake, five of Robert's exes - each with their own unique and scandalous past with him - show up to pay their respects and share their wild and naughty moments with him.
As the night progresses, tensions rise between the exes as they each make their case for why they should be the rightful heir to Robert's wealth. Lily, the favored ex, begins to feel insecure and doubts whether she truly deserves the inheritance.
As the exes reminisce about their past with Robert and try to outdo one another with their stories, secrets are revealed and alliances are formed. The night becomes a wild and unpredictable ride, punctuated by sexual tension, drunken confessions, and surprising twists.
In the end, it is up to Robert's lawyer to determine who will inherit his fortune. But the exes have one last surprise in store, throwing everything into chaos and leaving the audience wondering who will ultimately come out on top.