Three interwined stories between three young couples being on the run.

IvyEight6, beside the Formula link provided (header of page with format examples), I did a quick Google search and found the following that may help. Review how these were constructed and reply in the comments area with your second draft. The goal is to get this story’s logline in a form for us (community) to consume and help.

Three disparate strangers unexpectedly meet amidst [conflict] to discover that they must work together and defeat [antagonist] before [ticking clock].
OR
Three interlocking stories all connected by [prop] converge to reveal [adjectives/plot description] and how [character motivations and/or principal moral or lesson].
OR
Three strangers find each of their woeful fates is intertwined when they unexpectedly encounter one another in their search for the higher power at the source of their misery.
OR
Pulp Fiction: An anthology of four different stories, told from four different perspectives, set in the crime thriving suburbs of Los Angeles.
OR
Pulp Fiction: The lives of two mob hitmen, a boxer, a gangster’s wife, and a pair of diner bandits intertwine in four tales of violence and redemption.
OR
Magnolia: An epic mosaic of interrelated characters in search of love, forgiveness, and meaning in the San Fernando Valley.

Take care.