West of Her (2016)

Alone and adrift in life, Dan signs on with a mysterious organization, agreeing to roam the country with an enigmatic stranger named Jane, working by night, laying small linoleum tiles in the streets of towns across America, each bearing the same cryptic message. As they travel, their contentious relationship grows and deepens, changing both of their beliefs about what they're doing, until they're forced to choose between their work and the possibility of a future together.